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Chapman BJ, Proudfoot AT, Dawling S.Chapman BJ, et al. Among authors: proudfoot at.Br Med J (Clin Res Ed). 1983 Dec 3;287(6406):1672-3. doi: 10.1136/bmj.287.6406.1672.Br Med J (Clin Res Ed). 1983.PMID: 6227370Free PMC article.No abstract available.