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Modrow, Susanne and Hahn, B. H. and Shaw, G. M. and Gallo, R. C. and Wong-Staal, F. and Wolf, Hans J. (1987) Computer-assisted analysis of envelope protein sequences of seven human immunodeficiency virus isolates: prediction of antigenic epitopes in conserved and variable regions. Journal of virology 61 (2), pp. 570-578.