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Authors: R Roosendaal; E J Kuipers; J Buitenwerf; C van Uffelen; S G Meuwissen; G J van Kamp; C M Vandenbroucke-Grauls Journal: Am J Gastroenterol Date: 1997-09 Impact factor: 10.864
Authors: C J Hawkey; J A Karrasch; L Szczepañski; D G Walker; A Barkun; A J Swannell; N D Yeomans Journal: N Engl J Med Date: 1998-03-12 Impact factor: 91.245
Authors: J J Vicari; R M Peek; G W Falk; J R Goldblum; K A Easley; J Schnell; G I Perez-Perez; S A Halter; T W Rice; M J Blaser; J E Richter Journal: Gastroenterology Date: 1998-07 Impact factor: 22.682