Association of primary sclerosing cholangitis with HLA-DR and DQ antigens in Brazil - Bittencourt, P. L.; Goldberg, A. C.; Cançado, E. L. R.; Porta, G.; Farias, A. Q.; Marin, M. L. C.; Carrilho, F.; Silva, L. C. da; Kalil, J.; Laudanna, Antônio Atílio (Annual Meeting of The American Association for the Study of Liver Diseases, 1997)