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Keiser, Olivia; Keiser, O; Tweya, H; Boulle, A; Braitstein, P; Schechter, M; Brinkhof, Martin; Dabis, F; Tuboi, S; Sprinz, E; Pujades-Rodriguez, M; Calmy, A; Kumarasamy, N; Nash, D; Jahn, A; MacPhail, P; Lüthy, R; Wood, R; Egger, Matthias (2009). Switching to second-line antiretroviral therapy in resource-limited settings: comparison of programmes with and without viral load monitoring. AIDS, 23(14), pp. 1867-74. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/QAD.0b013e32832e05b2
