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Sampling-Based Approach to Determining Outcomes of Patients Lost to Follow-Up in Antiretroviral Therapy Scale-Up Programs in Africa. Geng, Elvin H. MD, MPH; Emenyonu, Nneka MPH; Bwana, Mwebesa Bosco MBChB, MMed; Glidden, David V. PhD; Martin, Jeffrey N. MD, MPH [Letter] JAMA. 300(5):506-507, August 6, 2008.
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