%0 Journal Article %T Convergent and divergent sequence evolution in the surface envelope glycoprotein of human immunodeficiency virus type 1 within a single infected patient. %A Holmes, E C %A Zhang, L Q %A Simmonds, P %A Ludlam, C A %A Brown, A J %A , %J Proceedings of the National Academy of Sciences %@ 0027-8424 %D 1992-06-01 %I Proceedings of the National Academy of Sciences %~ DeepDyve