Response to combination antiretroviral therapy: variation by age. by Sabin, C, Smith, C, d'Arminio Monforte, A, Battegay, M, Gabiano, C, Galli, L, Geelen, S, Gibb, D, Guiguet, M, Judd, A, Leport, C, Dabis, F, Pantazis, N, Porter, K, Raffi, F, Thorne, C, Torti, C, Walker, S, Warszawski, J, Wintergerst, U, Chene, G, Lundgren, J