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Kagan GIa, Vul'fovich IuV, Chumachenko NV, Koptelova EI.Kagan GIa, et al. Among authors: koptelova ei.Vestn Akad Med Nauk SSSR. 1973;28(2):71-5.Vestn Akad Med Nauk SSSR. 1973.PMID: 4204260Russian.No abstract available.