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Parry CD, Yach D, Tollman SM.Parry CD, et al. Among authors: yach d.S Afr Med J. 1992 Nov;82(5):299-300.S Afr Med J. 1992.PMID: 1448704No abstract available.
Parry CD, Yach D, Tollman SM.Parry CD, et al. Among authors: yach d.S Afr Med J. 1992 Nov;82(5):306-8.S Afr Med J. 1992.PMID: 1448708No abstract available.
von Schirnding YE, Yach D, Klein M.von Schirnding YE, et al. Among authors: yach d.S Afr Med J. 1991 Jul 20;80(2):79-82.S Afr Med J. 1991.PMID: 1862439