Authors: P A Van Hees; H J Van Lier; P H Van Elteren; M Driessen; R A Van Hogezand; G P Ten Velde; J H Bakker; J H Van Tongeren Journal: Gut Date: 1981-05 Impact factor: 23.059
Authors: M Campieri; G A Lanfranchi; G Bazzocchi; C Brignola; F Sarti; G Franzin; A Battocchia; G Labo; P R Dal Monte Journal: Lancet Date: 1981-08-08 Impact factor: 79.321
Authors: D H Winship; R W Summers; J W Singleton; W R Best; J M Becktel; L F Lenk; F Kern Journal: Gastroenterology Date: 1979-10 Impact factor: 22.682