CCR2-64I polymorphism is associated with lower maternal HIV-1 viral load and reduced vertical HIV-1 transmission. - Mabuka, J; Mackelprang, R; Lohman-Payne, B; Majiwa, M; Bosire, R; John-Stewart, G; Rowland-Jones, S; Overbaugh, J; Farquhar, C (2009)