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Authors: F K Chan; J J Sung; S C Chung; K F To; M Y Yung; V K Leung; Y T Lee; C S Chan; E K Li; J Woo Journal: Lancet Date: 1997-10-04 Impact factor: 79.321
Authors: A S Taha; S Dahill; C Morran; N Hudson; C J Hawkey; F D Lee; R D Sturrock; R I Russell Journal: Gastroenterology Date: 1999-02 Impact factor: 22.682
Authors: C J Hawkey; Z Tulassay; L Szczepanski; C J van Rensburg; A Filipowicz-Sosnowska; A Lanas; C M Wason; R A Peacock; K R Gillon Journal: Lancet Date: 1998-09-26 Impact factor: 79.321