Predicting patterns of long-term CD4 reconstitution in HIV-infected children starting antiretroviral therapy in sub-Saharan Africa: a cohort-based modelling study. por Picat, M, Lewis, J, Musiime, V, Prendergast, A, Nathoo, K, Kekitiinwa, A, Nahirya Ntege, P, Gibb, D, Thiebaut, R, Walker, A, Klein, N, Callard, R