HIV-1 and SIV predominantly use CCR5 expressed on a precursor population to establish infection in T follicular helper cells by Xu, Y, Phetsouphanh, C, Suzuki, K, Aggrawal, A, Graff-Dubois, S, Roche, M, Bailey, M, Alcantara, S, Cashin, K, Sivasubramaniam, R, Koelsch, K, Autran, B, Harvey, R, Gorry, P, Moris, A, Cooper, D, Turville, S, Kent, S, Kelleher, A, Zaunders, J