1. Division of Dermatology, Department of Internal Medicine, University of the Witwatersrand;
2. Department of Dermatology, University of Limpopo, Pietersburg Provincial Hospital, Limpopo, South Africa;
3. Division of Dermatology, Department of Medicine, University of Cape Town;
4. Department of Dermatology, Westville Hospital;
5. Department of Dermatology, Nelson R Mandela School of Medicine, University of Kwazulu Natal