1. Department of Dermatology; Queen Elizabeth Hospital Birmingham; Mindelsohn Way Birmingham B15 2WB U.K.
2. Department of Dermatology; University of California San Francisco; San Francisco CA U.S.A.
3. Department of Pathology ; University of California San Francisco; San Francisco CA U.S.A.
4. Department of Epidemiology and Biostatistics; University of California San Francisco; San Francisco CA U.S.A.
5. Centre for Global Health; Massachusetts General Hospital; Ragon Institute of MGH; MIT and Harvard; Harvard School of Medicine; Boston MA U.S.A.
6. Mbarara University of Science and Technology; Mbarara Uganda