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Rode H, Millar AJ, Cywes S, Bloch CE, Boes EG, Theron EJ, Lodder JV, van der Merwe AE, de Kock M.Rode H, et al.S Afr Med J. 1990 Apr 7;77(7):346-8.S Afr Med J. 1990.PMID: 2181702Clinical Trial.