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Journal of Community Genetics logoLink to Journal of Community Genetics
. 2010 Aug 9;1(2):83–90. doi: 10.1007/s12687-010-0013-1

General practitioner management of genetic aspects of a cardiac disease: a scenario-based study to anticipate providers’ practices

Kirsty Challen 1,, Hilary Harris 1, Ulf Kristoffersson 2, Irmgard Nippert 3, Joerg Schmidtke 4, Leo P Ten Kate 5, Caroline Benjamin 6, Elizabeth Anionwu 7, Anne-Marie Plass 8, Claire Julian-Reynier 9, Rodney Harris 1
PMCID: PMC3063843  PMID: 21475668

Abstract

It is increasingly recognised that genetics will have to be integrated into all parts of primary health care. Previous research has demonstrated that involvement and confidence in genetics varies amongst primary care providers. We aimed to analyse perceptions of primary care providers regarding responsibility for genetic tasks and factors affecting those perceptions. Postal questionnaire including a hypothetical case management scenario of a cardiac condition with a genetic component was sent to random samples of medically qualified general practitioners in France, Germany, Netherlands, Sweden and UK (n = 1,168). Logistic regression analysis of factors affecting primary care practitioners’ willingness to carry out genetic tasks themselves was conducted; 61% would take a family history themselves but only 38% would explain an inheritance pattern and 16% would order a genetic test. In multivariate analysis, only the country of practice was consistently predictive of willingness to carry out genetic tasks, although male gender predicted willingness to carry out the majority of tasks studied. The stage of career at which education in genetics had been provided was not predictive of willingness to carry out any of the tasks analysed. Country of practice is significantly predictive of attitudes towards genetics in primary care practice and therefore genetic education structure and content in Europe will need to be significantly tailored towards country-specific approaches.

Keywords: Genetics, Primary care, Education

Background

Over the last decade, basic scientific research has led to a greater understanding of the contribution made by genes to present and future health (Guttmacher and Collins 2002). It is increasingly recognised that genetic information will need to be integrated into all aspects of health care delivery, including primary care (Department of Health 2003; Greendale and Pyeritz 2001; Harris and Harris 1995). Patient advocacy groups have lobbied to raise health professionals’ awareness of genetic issues (World Alliance of Organizations for the Prevention of Birth Defects 2004), and the need for both patients and professionals to have an appropriate level of familiarity with the new technologies has been recognised by the European Commission (McNally et al. 2004).

Primary care providers have varying levels of involvement and confidence in genetics (Emery et al. 1999). We have demonstrated variable quality care provided for genetic conditions by non-geneticists (Harris et al. 1999). This has also been reported in Australia (Tyzack and Wallace 2003), the Netherlands (Baars et al. 2003; van Langen et al. 2003), Singapore (Yong et al. 2003), and USA (Barrison et al. 2003; Batra et al. 2002; Schroy et al. 2002; Taylor 2003). Core competencies for all health professionals and particular professional groups are being developed by expert panels (Calzone et al. 2002; Core Competency Working Group of the National Coalition for Health Professional Education in Genetics 2001; Kirk et al. 2003), and we have recently reported the educational priorities of the healthcare providers themselves (Julian-Reynier et al. 2008). A multiplicity of structures and organisations are involved in training health professionals in genetics (Challen et al. 2006, 2005; Henriksson and Kristoffersson 2006; Julian-Reynier and Arnaud 2006; Plass et al. 2006; Schmidtke et al. 2006). As part of a larger study in five European countries, we examined the self-reported behaviours and educational priorities of primary care providers in situations where genetics was relevant. This paper will present the results relating to perceptions of professional responsibility for genetic care amongst general practitioners, using hereditary cardiac disease as an example of the “new” genetics in common diseases. We aimed to analyse these attitudes and their determining factors.

Methods

Sampling

As part of the larger GenEd (Genetic Education for Nongenetic Health Professionals) study into educational priorities in genetics for primary care providers, general practitioners in France, Germany, Netherlands, Sweden and UK were sent a self-administered questionnaire in early 2005. The sample size was calculated based on a 10% precision (95% CI) for an educational outcome measure (Calefato et al. 2008). Germany used a deliberate over-sampling strategy because of the anticipated low response rate. In France and UK, a random sample of a representative database was taken, in Germany a random sample of MDs receiving reimbursement from sickness funds and training MD students was taken, in the Netherlands sampling was undertaken by the Netherlands Institute for Health Services Research excluding those who had recently participated in research and Sweden all general practitioners were approached. Non-responders were sent at least one reminder letter and, in some countries, were telephoned.

Questionnaire

The questionnaire was developed by a multidisciplinary group including geneticists, primary care providers and statisticians, initially in English. It was piloted in English in each participating country, then translated and back-translated to ensure consistency. Translated questionnaires were then re-piloted. As well as demographics, the questionnaire included a hypothetical scenario relating to sudden cardiac death, a diagnosis chosen because of the increasing recognition of genetic factors in its aetiology (as demonstrated by its inclusion in the 2005 revision of the UK National Service Framework for Heart Disease (Department of Health 2005)), but where “traditional” genetic teaching is unlikely to have featured. The text is shown in the text box. The vignette may have provided new information to some respondents. We wished to standardise their knowledge in order to interpret their subsequent practice intentions, as we intended the survey to be a pragmatic study of usual practice rather than a specific test of knowledge of HOCM.

Box: text of the questionnaire scenario
Mr Smith (aged 35) attends your surgery because his 27-year-old brother, a competitive swimmer, has just died suddenly. He collapsed in the pool and despite defibrillation was found to be dead. Although sudden death might not immediately suggest a genetic condition Mr Smith is worried because his mother’s sister died suddenly aged 30 and he asks whether the same may happened to him, his children Melanie (12 years), and Tom (6 months) or his brother (32) or sister (24).
He has been told that his brother’s post-mortem demonstrated hypertrophic obstructive cardiomyopathy (HCM), which can be inherited as an autosomal dominant condition. 80% of non-traumatic sudden deaths in young athletes are due to inherited or congenital cardiovascular abnormalities and HCM accounts for 40–50% of these. Genetic testing may lead to identification of patients at high risk for sudden death as early as 10 years of age. Treatment can be considered with implantable defibrillators or medication.

Respondents were asked who, in the scenario, should perform the following tasks, with options being “myself without seeking further information”, “myself after consulting a journal or the web”, “myself after consulting a colleague”, “a genetic specialist”, “a cardiologist”:

  • Taking a family history

  • Explaining the inheritance pattern

  • Explaining the risk to the patient’s children

  • Giving information about available gene tests

  • Informing the patient of the implications if no mutation were to be found

  • Informing the patient of the implications if a mutation were to be found

  • Ordering the genetic test

  • Explaining the test result

  • Explaining the implications of the test result for the patient’s children

Statistical analysis

Responses were entered into an SPSS v11.0 data sheet using SNAP v7.0 questionnaire and scanning software. For each task addressed in the questionnaire, the five possible responses were dichotomised into “likely to do oneself” and “should be done by a different professional”. Univariate analysis was carried out for all tasks for association with: country of practice, gender, age (over/under 50 years), years in practice (under 10, 11–20, over 20), highest level of education in genetics, and usefulness or otherwise of continuing medical education, specialist training and undergraduate training. Factors found to be predictive at univariate analysis of “likely to do oneself” were entered into multivariate stepwise logistic regression analysis using a forward procedure (Wald test) (Hosmer and Lemeshow 2000). A type 1 error of <0.05 was chosen for the variables to be included in the final model.

Ethics

Ethical approval was provided by the Eastern MREC (UK) and appropriate approval was obtained in all countries.

Results

Overall, 1,168 (28.6%) practitioners responded (France 236 (48.7%), Germany 251 (20.8%), Netherlands 254 (37%), Sweden 262 (38.7%), UK 165 (23.1%)). Demographics of respondents are shown in Table 1. The highest level of genetic education varied significantly (p < 0.05) between countries; rates of receiving relevant undergraduate education were: Sweden 90%, UK 65%, Germany 60%, Netherlands 57% and France 50%. The highest level of genetic education was also significantly associated with years spent in practice (Table 2; χ 2 = 84.578, df = 8, p < 0.001).

Table 1.

Demographics of respondents (n varies due to incomplete responses)

Characteristic Number (percentage)
Country of practice
 France 236 (20.2)
 Germany 251 (21.5)
 Netherlands 254 (21.7)
 Sweden 262 (22.4)
 UK 165 (14.1)
Gender
 Male 764 (65.4)
 Female 404 (34.6)
Age group
 ≤50 years 572 (49.0)
 >50 years 596 (51.0)
Years in practice
 ≤10 182 (15.6)
 11–20 466 (39.9)
 >20 520 (44.5)
Patients seen per week
 <25 33 (2.9)
 26–50 133 (11.5)
 51–100 358 (31.0)
 101–150 309 (26.8)
 151–200 199 (17.2)
 >200 122 (10.6)
Highest level of education in genetics
 None 224 (19.2)
 Undergraduate 680 (58.2)
 During specialist training 53 (4.5)
 CME 172 (14.7)
 Further degree 32 (2.7)
 Missing 7 (0.6)
Value of undergraduate training (n = 880)
 Useful 538 (61.1)
 Useless 342 (38.9)
Value of specialist training (n = 71)
 Useful 61 (85.9)
 Useless 10 (14.1)
Value of CME (n = 172)
 Useful 164 (95.3)
 Useless 8 (4.7)

Table 2.

Highest level of education by years in practice

Undergraduate Specialist CME Degree None Total
≤10 years 130 16 19 4 12 181
11–20 years 309 18 60 10 65 462
>20 years 241 19 93 18 147 518
Total 680 53 172 32 224 1161

Numbers of respondents willing to carry out each of the tasks themselves is shown in Table 3. Most (61%) expected to take a family history, and a significant minority (38%) were willing to explain an inheritance pattern. However, only 10.3 (28%) were willing to carry out any other tasks. Univariate analysis of factors predicting likelihood of carrying out tasks oneself is shown in Table 4. Factors which remained significant at multivariate analysis are shown in Table 5. Only country of practice and gender were consistently predictive of willingness to carry out more complex tasks, with French/German and male GPs showing more willingness.

Table 3.

Willingness to carry out tasks oneself

Task Number willing to perform task Percentage
Taking a family history 717 61.4
Explaining the inheritance pattern 445 38.1
Explaining the genetic risk to Mr Smith’s children 327 28
Giving information about available genetic tests 258 22.1
Informing Mr Smith of the implications of no mutation being found 316 27.1
Informing Mr Smith of the implications of a mutation being found 169 14.5
Ordering the genetic test 183 15.7
Explaining the test results 129 11
Explaining the implications of the test results for Mr Smith’s children 120 10.3

Table 4.

Univariate analysis

Task Variable Odds ratio for doing oneself (95% CI)
Taking a family history Country (reference UK)
 France 0.59 (0.39–0.90)
 Germany 2.07 (1.33–3.23)
 Netherlands 0.20 (0.13–0.30)
 Sweden 2.41 (1.54–3.79)
Gender (reference male)
 Female 1.25 (0.98–1.61)
Age (reference >50)
 ≤50 0.73 (0.57–0.92)
Years in practice (reference >20)
 11–20 0.90 (0.69–1.16)
 ≤10 0.93 (0.66–1.32)
Highest genetic education (reference none)
 Undergraduate 1.45 (1.07–1.98)
 During specialist training 1.67 (0.88–3.18)
 CME 0.52 (0.35–0.78)
Value of genetic education (reference useless)
 Useful undergraduate 0.96 (0.72–1.27)
 Useful specialist 0.41 (0.08–2.12)
 Useful CME 0.23 (0.05–1.18)
Explaining the inheritance pattern Country (reference UK)
 France 1.91 (1.26–2.89)
 Germany 1.31 (0.87–1.98)
 Netherlands 0.91 (0.59–1.38)
 Sweden 1.48 (0.98–2.23)
Gender (reference male)
 Female 1.05 (0.82–1.35)
Age (reference >50)
 ≤50 1.44 (1.14–1.83)
Years in practice (reference >20)
 11–20 1.40 (1.08–1.81)
 ≤10 1.23 (0.87–1.74)
Highest genetic education (reference none)
 Undergraduate 1.48 (1.07–2.04)
 During specialist training 1.96 (1.07–3.61)
 CME 1.09 (0.71–1.67)
Value of genetic education (reference useless)
 Useful undergraduate 1.55 (1.17–2.05)
 Useful specialist 1.45 (0.37–5.66)
 Useful CME 0.84 (0.19–3.65)
Explaining the risk to Mr Smith’s children Country (reference UK)
 France 2.95 (1.85–4.70)
 Germany 1.64 (1.02–2.63)
 Netherlands 1.31 (0.81–2.13)
 Sweden 1.38 (0.85–2.21)
Gender (reference male)
 Female 0.64 (0.48–0.84)
Age (reference >50)
≤50 1.20 (0.93–1.55)
Years in practice (reference >20)
 11–20 1.03 (0.78–1.36)
 ≤10 0.89 (0.61–1.31)
Highest genetic education (reference none)
 Undergraduate 1.05 (0.75–1.47)
 During specialist training 1.49 (0.79–2.81)
 CME 0.89 (0.57–1.40)
Value of genetic education (reference useless)
 Useful undergraduate 1.50 (1.10–2.05)
 Useful specialist training 1.62 (0.38–6.88)
 Useful CME 0.56 (0.13–2.43)
Giving information about available gene tests Country (reference UK)
 France 2.17 (1.30–3.63)
 Germany 1.84 (1.10–3.07)
 Netherlands 1.27 (0.75–2.16)
 Sweden 1.59 (0.95–2.67)
Gender (reference male)
 Female 0.63 (0.46–0.85)
Age (reference >50)
 ≤50 0.69 (0.52–0.91)
Years in practice (reference >20)
 11–20 0.79 (0.59–1.07)
 ≤10 0.56 (0.36–0.88)
Highest genetic education (reference none)
 Undergraduate 0.87 (0.61–1.24)
 During specialist training 1.10 (0.56–2.18)
 CME 0.73 (0.45–1.19)
Value of genetic education (reference useless)
 Useful undergraduate 1.48 (1.05–2.09)
 Useful specialist training 3.77 (0.44–31.96)
 Useful CME 0.73 (0.14–3.77)
Informing Mr Smith of the implications if no mutation were to be found Country (reference UK)
 France 4.01 (1.82–8.80)
 Germany 23.97 (11.29–50.87)
 Netherlands 7.76 (3.63–16.62)
 Sweden 5.58 (2.59–12.03)
Gender (reference male)
 Female 0.58 (0.43–0.77)
Age (reference >50)
 ≤50 1.06 (0.82–1.37)
Years in practice (reference >20)
 11–20 1.02 (0.78–1.35)
 ≤10 0.65 (0.43–0.98)
Highest genetic education (reference none)
 Undergraduate 0.99 (0.71–1.40)
 During specialist training 1.53 (0.81–2.88)
 CME 1.09 (0.70–1.70)
Value of genetic education (reference useless)
 Useful undergraduate 1.27 (0.93–1.74)
 Useful specialist training 0.68 (0.17–2.69)
 Useful CME 0.61 (0.14–2.66)
Informing Mr Smith of the implications if a mutation were to be found Country (reference UK)
 France 4.46 (1.83–10.89)
 Germany 8.51 (3.58–20.20)
 Netherlands 3.42 (1.39–8.42)
 Sweden 4.64 (1.92–11.21)
Gender (reference male)
 Female 0.52 (0.36–0.76)
Age (reference >50)
 ≤50 0.85 (0.61–1.18)
Years in practice (reference >20)
 11–20 0.84 (0.60–1.18)
 ≤10 0.56 (0.33–0.96)
Highest genetic education (reference none)
 Undergraduate 1.32 (0.84–2.07)
 During specialist training 1.49 (0.66–3.40)
 CME 1.18 (0.66–2.13)
Value of genetic education (reference useless)
 Useful undergraduate 1.36 (0.92–2.01)
 Useful specialist training 1.77 (0.20–15.52)
 Useful CME 0.23 (0.05–1.04)
Ordering the genetic test Country (reference UK)
 France 2.16 (1.11–4.20)
 Germany 3.33 (1.76–6.33)
 Netherlands 1.76 (0.90–3.46)
 Sweden 2.25 (1.17–4.33)
Gender (reference male)
 Female 0.62 (0.43–0.88)
Age (reference >50)
 ≤50 0.85 (0.62–1.17)
Years in practice (reference >20)
 11–20 0.94 (0.67–1.32)
 ≤10 0.72 (0.44–1.19)
Highest genetic education (reference none)
 Undergraduate 1.24 (0.80–1.90)
 During specialist training 0.92 (0.38–20.23)
 CME 1.15 (0.66–2.02)
Value of genetic education (reference useless)
 Useful undergraduate 1.29 (0.88–1.87)
 Useful specialist training 0.35 (0.08–1.65)
 Useful CME 0.55 (0.11–2.89)
Explaining the test result Country (reference UK)
 France 5.45 (1.87–15.87)
 Germany 10.24 (3.62–28.95)
 Netherlands 3.55 (1.20–10.56)
 Sweden 4.12 (1.41–12.08)
Gender (reference male)
 Female 0.36 (0.22–0.57)
Age (reference >50)
 ≤50 0.73 (0.51–1.06)
Years in practice (reference >20)
 11–20 0.86 (0.58–1.28)
 ≤10 0.68 (0.38–1.22)
Highest genetic education (reference none)
 Undergraduate 1.47 (0.88–2.45)
 During specialist training 0.80 (0.26–2.46)
 CME 0.90 (0.44–1.83)
Value of genetic education (reference useless)
 Useful undergraduate 1.05 (0.69–1.60)
 Useful specialist training NA
 Useful CME 0.25 (0.05–1.35)
Explaining the implications of the test result for the children Country (reference UK)
 France 10.58 (2.48–45.19)
 Germany 16.52 (3.94–69.25)
 Netherlands 9.05 (2.12–38.70)
 Sweden 7.21 (1.67–31.09)
Gender (reference male)
 Female 0.47 (0.30–0.74)
Age (reference >50)
 ≤50 0.81 (0.56–1.19)
Years in practice (reference >20)
 11–20 0.87 (0.58–1.31)
 ≤10 0.82 (0.46–1.44)
Highest genetic education (reference none)
 Undergraduate 1.05 (0.64–1.73)
 During specialist training 0.88 (0.32–2.43)
 CME 0.84 (0.42–1.66)
Value of genetic education (reference useless)
 Useful undergraduate 1.30 (0.83–2.06)
 Useful specialist training 0.98 (0.11–9.14)
 Useful CME 0.69 (0.08–5.98)

Table 5.

Multivariate analysis

Task Factors predictive of doing it oneself Wald score P
Taking a family history Country 193.05 <0.005
Explaining the inheritance pattern Country 25.68 <0.005
Age 7.12 0.008
Quality of undergraduate education 12.60 <0.005
Explaining the risk to Mr Smith’s children Country 24.04 <0.005
Quality of undergraduate education 7.12 0.008
Giving information about available gene tests Quality of undergraduate education 6.29 0.012
Gender 4.59 0.032
Age 6.40 0.011
Informing Mr Smith of the implications if no mutation were to be found Country 93.09 <0.005
Gender 6.16 0.013
Informing Mr Smith of the implications if a mutation were to be found Country 31.02 <0.005
Gender 9.51 0.002
Ordering the genetic test Country 15.07 0.005
Gender 7.22 0.007
Explaining the test result Country 29.24 <0.005
Gender 15.05 <0.005
Explaining the implications of the test result for the children Country 19.51 0.001
Gender 7.93 0.005

Discussion

Although most GPs (over 60%) would consider it part of their role to take a family history, far fewer (less than 25%) would be willing to discuss specific genetic tests or their implications. Taking a family history is generally considered essential for the appropriate management of genetic disorders. Thirty-eight per cent of GPs in this study felt that this should be carried out by a specialist (either a geneticist or a cardiologist).

The country of practice was the only consistent predictor of GPs carrying out tasks themselves (with or without reference to a textbook, the web or a colleague), with French and German practitioners being more likely to do so. There appear to be two different patterns: German, Swedish and UK GPs were more likely to undertake initial tasks (particularly taking a family history), with lessening likelihood as the tasks became more complex, while French and Dutch GPs tended either to carry out a significant number of tasks or complete none and refer for the entire genetic care “package”. It is unclear whether this reflects varying awareness or availability of specialist genetic services or varying willingness to refer to those services. It is likely that the health service model in each country will affect practitioners’ expectations of managing the patient themselves or performing a gatekeeper role for secondary care. It may also be that varying health service structures restrict the availability of specific tests to non-specialist practitioners.

At least 50% of GPs recalled receiving undergraduate genetic education but this varied between countries. However, less than 10% recalled receiving genetic education during specialist training or continuing medical education, suggesting that any formal genetic education they had received was unlikely to have been up-to-date or clinically relevant. We could hypothesise that the counterintuitive finding (see Table 2) of those practitioners who had been practising longer having received more post-specialist training in genetics represents a “catch-up” phenomenon; those practitioners trained more recently received the same information during undergraduate or specialist training. The perceived usefulness of genetic education as an undergraduate was a positive predictor of likelihood to explain inheritance patterns, risks and gene tests. This may reflect increased comfort in discussing genetic issues amongst those practitioners who underwent early engagement with genetics.

Being male appeared to increase the likelihood of carrying out many genetic tasks, particularly the more complex ones. There are several possible contributors to this finding. The tasks we assessed were primarily biomedical, and significant literature demonstrates the tendency of male physicians to communicate biomedical rather than psychosocial information (Roter et al. 2002). Also, the self-reporting nature of this study may be affected by the tendency of female physicians to under-rate their own competence (Nomura et al. 2010).

This is to our knowledge the first study in Europe of primary care providers’ attitudes to genetic management and how they relate to genetic education. Although the response rate was not high, this is a common problem for postal surveys and all appropriate methods were used to increase the response rates. Databases from which samples were taken varied slightly between countries, but represented the only available national sources with doctors’ addresses and specialties. We recognise that we have studied self-reported rather than actual behaviour but analysis of actual behaviour would have been impossible to be organised practically and self-reporting can be considered as a reliable proxy measure. Although the scenario used related only to one condition, sudden death from hypertrophic cardiomyopathy was selected as a scenario diagnosis specifically because it was unlikely to have featured in traditional Mendelian genetics teaching. The importance of genetics in its aetiology is, however, well recognised. We therefore suggest that it is likely to be a good model for common complex disorders with genetic aetiology encountered by primary care providers.

We have previously demonstrated that genetic care by non-geneticists is patchy and often poorly documented (Lane et al. 1997; Williamson et al. 1997; Williamson et al. 1996a, b). This is supported by qualitative research which found highly variable levels of information around referral and testing for Factor V Leiden (Saukko et al. 2007) and multiple potential barriers to effective communication amongst GPs providing antenatal counselling (Nagle et al. 2008). Our work shows clearly that, apart from family history taking, many European GPs do not consider that “genetic” care should form part of their practice.

Conclusions

It is clear that given the significant effect of country of practice, independent of all other factors, on practitioner behaviour, recommendations on genetic education at all levels will have to be sensitive to country-specific issues. Educational structures and content will require tailoring to local priorities and learning conventions. Any standards of care for non-genetic specialists providing some aspects of genetic care will need to be appropriately contextualised into the local system of health care and health education and it is unlikely that a pan-European “one size fits all” policy will be immediately workable or acceptable.

Acknowledgements

Thanks to Karina Bertmaring, Daniel Cottam and Christine Waterman who provided invaluable administrative and data management support. The study was funded by European Community FP5 grant QLG4-CT-2001-30216.

Conflicts of interest

None.

Authors’ contributions

RH, HH, IN, JS, LPtK, UK and CJ-R conceived the study. All authors were involved in questionnaire construction, statistical analysis and drafting of the manuscript.

Open Access

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

Contributor Information

Kirsty Challen, Phone: +44-1925-757853, Email: kirstychallen@hotmail.com.

Hilary Harris, Email: hilaryharris@btinternet.com.

Ulf Kristoffersson, Email: Ulf.kristoffersson@med.lu.se.

Irmgard Nippert, Email: nippert@uni-muenster.de.

Joerg Schmidtke, Email: Schmidtke.joerg@mh-hannover.de.

Leo P. Ten Kate, Email: LP.tenKate@vumc.nl

Caroline Benjamin, Email: c.m.benjamin@bham.ac.uk.

Elizabeth Anionwu, Email: Elizabeth.anionwu@tvu.ac.uk.

Anne-Marie Plass, Email: amc.plass@vumc.nl.

Claire Julian-Reynier, Email: claire.julian-reynier@inserm.fr.

Rodney Harris, Email: rharrisgened@btinternet.com.

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