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. 1997 Sep 13;315(7109):672–675. doi: 10.1136/bmj.315.7109.672
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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.
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1Department of Primary Care and Population Sciences, University College London Medical School/Royal Free Hospital School of Medicine, Whittington Hospital.
PMCID: PMC2127461 PMID: 9310574