University of Cape Town (UCT), University of Cape Town (UCT), University of KwaZulu-Natal, University of Cape Town (UCT), University of KwaZulu-Natal, South African Medical Research Council, University of KwaZulu-Natal, University of KwaZulu-Natal, University of Cape Town (UCT), University of KwaZulu-Natal, University of KwaZulu-Natal, Foundation for Innovative New Diagnostics (FIND), University of Cape Town (UCT), University of Cape Town (UCT), University of Cape Town (UCT) - Division of Endocrinology, University of East Anglia (UEA) - Norwich Medical School and King’s College London