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Ward BG, Shepherd JH, Monaghan JM.Ward BG, et al.Br Med J (Clin Res Ed). 1985 May 4;290(6478):1301-2. doi: 10.1136/bmj.290.6478.1301.Br Med J (Clin Res Ed). 1985.PMID: 3922467Free PMC article.No abstract available.