Authors: I Bjarnason; G Zanelli; T Smith; P Prouse; P Williams; P Smethurst; G Delacey; M J Gumpel; A J Levi Journal: Gastroenterology Date: 1987-09 Impact factor: 22.682
Authors: A Z Leite; A M Sipahi; A O Damião; A M Coelho; A T Garcez; M C Machado; C A Buchpiguel; F P Lopasso; M L Lordello; C L Agostinho; A A Laudanna Journal: Gut Date: 2001-02 Impact factor: 23.059