%0 Journal Article %T Human immunodeficiency virus type 2 infection and fusion of CD4-negative human cell lines: induction and enhancement by soluble CD4 %A Clapham, P R %A McKnight, A %A Weiss, R A %J Journal of Virology %@ 0022-538X %D 1992-06-01 %I American Society for Microbiology %~ DeepDyve