From the Department of Surgery, Faculty of Health Sciences (M.M., D.K.), Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand Medical School, Parktown, Johannesburg; National Health Laboratory Service, School of Pathology (S.P.), Chris Hani Baragwanath Academic Hospital, Faculty of Health Sciences, University of the Witwatersrand, Gauteng (S.P.); and Faculty of Health Sciences (F.P.), Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand Medical School, Parktown, Johannesburg, South Africa.