Central role of reverting mutations in HLA associations with human immunodeficiency virus set point. by Matthews, P, Prendergast, A, Leslie, A, Crawford, H, Payne, R, Rousseau, C, Rolland, M, Honeyborne, I, Carlson, J, Kadie, C, Brander, C, Bishop, K, Mlotshwa, N, Mullins, J, Coovadia, H, Ndung'u, T, Walker, B, Heckerman, D, Goulder, P