1. Department of Dermatology, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal , Durban , South Africa
2. Biostatistics, Faculty of Health Sciences Management, Nelson Mandela University , Port Elizabeth , South Africa
3. Lenzy Dermatology & Hair Loss Center , Chicopee, MA , USA
4. Department of Dermatology, University of Connecticut , MA , USA