Authors: J E Ormand; N J Talley; R G Shorter; C R Conley; H A Carpenter; A Fich; W R Wilson; S F Phillips Journal: Dig Dis Sci Date: 1991-02 Impact factor: 3.199
Authors: T L Fong; C P Dooley; M Dehesa; H Cohen; R Carmel; P L Fitzgibbons; G I Perez-Perez; M J Blaser Journal: Gastroenterology Date: 1991-02 Impact factor: 22.682