1) The study examines the use of doctor time for antiretroviral treatment (ART) delivery in Siem Reap, Cambodia between 2004 and 2005. 2) It finds that the doctor time needed per patient was reduced by 14-33% from 2004 to 2005 due to fewer patient visits and shorter consultations. 3) Extrapolating to 2013, the clinic will need between 2 to 5 full-time doctors to provide ART based on assumptions about patient survival and further reductions in doctor time per patient.