[1] World Hlth Org, Antiretroviral Treatment & HIV Care, Dept HIV AIDS, CH-1211 Geneva 27, Switzerland
[2] World Hlth Org, STOP TB Dept, CH-1211 Geneva 27, Switzerland
[3] Imperial Coll Healthcare NHS Trust, St Marys Hosp, Jefferiss Wing, London, England
[4] S African Ctr Epidemiol Modeling & Anal, Stellenbosch, South Africa