1. CESP INSERM-UVSQ U1018, 94807 Villejuif, France
2. Hôpital Ambroise Paré, AP-HP, 92100 Boulogne-Billancourt, France
3. Université de Versailles—Saint-Quentin, 78035 Versailles, France
4. Faculty of Health Sciences, University of Cape Town, Cape Town 7701, South Africa
5. HIV Prevention Research Unit, MRC, Durban 3630, South Africa
6. IIDMM, University of Cape Town, Cape Town 7701, South Africa
7. NHLS, Groote Schuur Hospital, Cape Town 7937, South Africa