1. Department of Family Medicine and Community Health; University of Minnesota Medical School; Duluth Minnesota USA
2. Department of Psychiatry; St. John's Medical College and Hospital; Bangalore India
3. Wits Reproductive Health and HIV Institute (WRHI), Faculty of Health Sciences; University of the Witwatersrand; Johannesburg South Africa
4. Department of Epidemiology, CAPHRI; Maastricht University; Maastricht Netherlands
5. c/o Cochrane Skin Group; The University of Nottingham; Nottingham UK
6. Complementary Medicine Department; Peninsula Medical School, University of Exeter; Exeter UK