A step ahead on the HIV collaboratory. por Murphy, R, Autran, B, Katlama, C, Brucker, G, Debre, P, Calvez, V, Clotet, B, Clumeck, N, Costagliola, D, Deeks, S, Dorrell, L, Gatell, J, Haase, A, Klein, M, Lazzarin, A, Mcmichael, A, Papagno, L, Schacker, T, Wain-Hobson, S, Walker, B, Youle, M