1. Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
3. Centers for Disease Control and Prevention, Atlanta, Georgia, USAProject IRECAM (Investigation of Retroviruses in Cameroon), Yaoundé, Cameroon
4. Project IRECAM (Investigation of Retroviruses in Cameroon), Yaoundé, Cameroon
5. Johns Hopkins Cameroon Program, Yaoundé, Cameroon