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Mbawuike IN, Piedra PA, Cate TR, Couch RB.Mbawuike IN, et al. Among authors: piedra pa.J Med Virol. 1996 Oct;50(2):105-11. doi: 10.1002/(SICI)1096-9071(199610)50:2<105::AID-JMV1>3.0.CO;2-E.J Med Virol. 1996.PMID: 8915874Clinical Trial.