Authors: F E Preston; D R Triger; J C Underwood; G Bardhan; V E Mitchell; R M Stewart; E K Blackburn Journal: Lancet Date: 1978-09-16 Impact factor: 79.321
Authors: J C Hoefs; D Aufrichtig; S Lottenberg; G C Kanel; B S Donner; L A Ferrari; S Leeman; R M Friedenberg Journal: Dig Dis Sci Date: 1986-10 Impact factor: 3.199