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Kauffmann RH, de Graeff J, de la Rivière GB, van Es LA.Kauffmann RH, et al.Am J Med. 1976 Jun;60(7):1048-54. doi: 10.1016/0002-9343(76)90579-9.Am J Med. 1976.PMID: 937349
Valentijn RM, Kauffmann RH, de la Rivière GB, Daha MR, Van ES LA.Valentijn RM, et al. Among authors: kauffmann rh.Am J Med. 1983 Mar;74(3):375-81. doi: 10.1016/0002-9343(83)90954-3.Am J Med. 1983.PMID: 6219575
Van Es LA, Daha MR, Valentijn RM, Kauffmann RH.Van Es LA, et al. Among authors: kauffmann rh.Neth J Med. 1984;27(9):350-8.Neth J Med. 1984.PMID: 6083461Review.No abstract available.
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