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Dunbar JA, Penttila A, Pikkarainen J.Dunbar JA, et al. Among authors: pikkarainen j.Br Med J (Clin Res Ed). 1987 Dec 5;295(6611):1458-60. doi: 10.1136/bmj.295.6611.1458.Br Med J (Clin Res Ed). 1987.PMID: 3121062Free PMC article.Review.
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