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Authors: G Meucci; M Tatarella; M Vecchi; M L Ranzi; E Biguzzi; G Beccari; E Clerici; R de Franchis Journal: J Clin Gastroenterol Date: 1997-12 Impact factor: 3.062
Authors: C M Thorburn; G D Friedman; C J Dickinson; J H Vogelman; N Orentreich; J Parsonnet Journal: Gastroenterology Date: 1998-08 Impact factor: 22.682