[1] Univ Hosp Geneva, Dept Dermatol & Venerol, CH-1211 Geneva, Switzerland
[2] Univ Hosp Geneva, Div Infect Dis, Dept Internal Med, CH-1211 Geneva, Switzerland
[3] Univ Hosp Geneva, Infect Control Program, CH-1211 Geneva, Switzerland
[4] Univ Hosp Geneva, Virol Lab, Geneva, Switzerland
[5] Univ Hosp Geneva, AIDS Ctr, Geneva, Switzerland