Department of Medicine, Division of Lipidology and Hatter Institute for Cardiovascular Research in Africa, University of Cape Town, 4th Floor Chris Barnard Building, Anzio Road, 7925 Observatory, Cape Town, South Africa. dirk.blom@uct.ac.za. Carbohydrate and Lipid Metabolism Research Unit, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa. Lipid Clinic Heart Institute (InCor), University of Sao Paulo Medical School Hospital, Sao Paulo, Brazil. Hospital Israelita Albert Einstein, Sao Paulo, Brazil. Division of Chemical Pathology, University of Cape Town Health Science Faculty, Cape Town, South Africa.