Dynamics and frequency of Gag transmitted polymorphisms in Zambia. - Schaefer, M.; Carlson, J.; Claiborne, D.; Prince, J.; Kilembe, W.; Tang, J.; Farmer, P.; Shapiro, R.; Ndung'u, T.; Frater, J.; Goulder, P.; Kaslow, R.; et al. (Retrovirology, 2012)