Human immunodeficiency virus type 1 envelope gene structure and diversity in vivo and after cocultivation in vitro

K. Kusumi, B. Conway, S. Cunningham, A. Berson, C. Evans, A. K.N. Iversen, D. Colvin, M. V. Gallo, S. Coutre, E. G. Shpaer, D. V. Faulkner, A. DeRonde, S. Volkman, C. Williams, M. S. Hirsch, J. I. Mullins