[1] Univ KwaZulu Natal, Nelson R Mandela Sch Med, Dept Dermatol, Durban, South Africa
[2] Univ Ilorin, Fac Clin Sci, Dept Paediat & Child Hlth, Coll Hlth Sci, Ilorin, Nigeria
[3] Univ KwaZulu Natal, Nelson R Mandela Sch Med, Ctr AIDS Programme Res South Africa CAPRISA, Durban, South Africa
[4] Univ KwaZulu Natal, Sch Publ Hlth & Nursing, Durban, South Africa