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Coetzee JC, Sevenster CB, Fourie FL, van der Merwe JV, Helberg LA.Coetzee JC, et al. Among authors: sevenster cb.S Afr Med J. 1989 Jul 15;76(2):62-3.S Afr Med J. 1989.PMID: 2749426
Fourie FL, Bosman E, Huyser C, Esterhuizen AD, Sevenster CB, van der Merwe JV.Fourie FL, et al. Among authors: sevenster cb.S Afr Med J. 1993 Jan;83(1):43-6.S Afr Med J. 1993.PMID: 8424204
van der Merwe JV, Truter P, Sevenster C, Grace A, Botes A, Wimmers M, de Milander C, Snyman E.van der Merwe JV, et al.S Afr Med J. 1987 Feb 21;71(4):223-6.S Afr Med J. 1987.PMID: 3824090