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. 2017 Jun 30;7(6):e012826. doi: 10.1136/bmjopen-2016-012826

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Flow diagram of participants. Note: *117 at baseline were excluded at 3-year follow-up having met the exclusion criteria; (1) inability to complete the questionnaire due to poor health (eg, cognitive impairment, dementia, stroke) and (2) had expressed a wish to their doctor that they did not want to participate further in research studies.