Authors: R D Soloway; W H Summerskill; A H Baggenstoss; M G Geall; G L Gitnićk; I R Elveback; L J Schoenfield Journal: Gastroenterology Date: 1972-11 Impact factor: 22.682
Authors: J I Esteban; R Esteban; L Viladomiu; J C López-Talavera; A González; J M Hernández; M Roget; V Vargas; J Genescà; M Buti Journal: Lancet Date: 1989-08-05 Impact factor: 79.321