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. 1997 Jul 19;315(7101):180–183. doi: 10.1136/bmj.315.7101.180
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T Greenhalgh
1
T Greenhalgh
1Department of Primary Care and Population Sciences, University College London Medical School/Royal Free Hospital School of Medicine, Whittington Hospital, London.
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1Department of Primary Care and Population Sciences, University College London Medical School/Royal Free Hospital School of Medicine, Whittington Hospital, London.
PMCID: PMC2127107 PMID: 9251552