Evolution and transmission of stable CTL escape mutations in HIV infection. by Goulder, P, Brander, C, Tang, Y, Tremblay, C, Colbert, R, Addo, M, Rosenberg, E, Nguyen, T, Allen, R, Trocha, A, Altfeld, M, He, S, Bunce, M, Funkhouser, R, Pelton, S, Burchett, S, McIntosh, K, Korber, B, Walker, B