Authors: P A Cann; N W Read; J Cammack; H Childs; S Holden; R Kashman; J Longmore; S Nix; N Simms; K Swallow; J Weller Journal: Gut Date: 1983-03 Impact factor: 23.059
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Authors: K C Hyams; A L Bourgeois; B R Merrell; P Rozmajzl; J Escamilla; S A Thornton; G M Wasserman; A Burke; P Echeverria; K Y Green Journal: N Engl J Med Date: 1991-11-14 Impact factor: 91.245