Authors: S Sontag; D Y Graham; A Belsito; J Weiss; A Farley; R Grunt; N Cohen; D Kinnear; W Davis; A Archambault Journal: N Engl J Med Date: 1984-09-13 Impact factor: 91.245
Authors: S K Lam; W M Hui; W Y Lau; F J Branicki; C L Lai; A S Lok; M M Ng; P J Fok; G P Poon; T K Choi Journal: Gastroenterology Date: 1987-05 Impact factor: 22.682