Authors: J Parsonnet; G D Friedman; D P Vandersteen; Y Chang; J H Vogelman; N Orentreich; R K Sibley Journal: N Engl J Med Date: 1991-10-17 Impact factor: 91.245
Authors: L G Coelho; S S Das; Q N Karim; M M Walker; D M Queiroz; E N Mendes; G F Lima Júnior; C A de Oliveira; J H Baron; L de P Castro Journal: Arq Gastroenterol Date: 1987 Jan-Mar