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Pihl E, Hughes ES, Nind AP, Nairn RC.Pihl E, et al. Among authors: nind ap.Br Med J. 1975 Sep 27;3(5986):742-3. doi: 10.1136/bmj.3.5986.742.Br Med J. 1975.PMID: 1174874Free PMC article.
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