iPrEx OLE was fully enrolled in July 2012 and every participant is being followed for 72 weeks. Participants visit the study clinics at four, eight and 12 weeks, and every 12 weeks thereafter. Last visit in iPrEx OLE is planned by late November of 2013.
| Lima | |
| Iquitos | |
| Guayaquil | |
| San Francisco | |
| Boston | |
| Chicago | |
| São Paulo | |
| Rio de Janeiro | |
| Chiang Mai | |
| Cape Town |