Appropriate time for taking ARVs in this study is within 2 hours of the time that the participant is supposed to take his/her medication. Therefore, a dose is recorded as being taken correctly if it was reported taken either within 2 hours before or within 2 hours after the time they are supposed to take that day's particular dose. If more than 2 hours up to <12 hours lapse from the time the participant was supposed to take a dose, that particular dose will be recorded as delayed. If the participant does not take his/her medication for 12 or more hours, that particular dose will be reported as missed.