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Pullen GP, Best NR, Maguire J.Pullen GP, et al. Among authors: best nr.Br Med J (Clin Res Ed). 1984 Sep 8;289(6445):612-3. doi: 10.1136/bmj.289.6445.612.Br Med J (Clin Res Ed). 1984.PMID: 6432211Free PMC article.No abstract available.