Authors: Fernando Fornari; Carmen P F Freitag; Marcos E S Duarte; Cleber R P Kruel; Paulo R O Thomé; Paulo R S Sanches; Luise Meurer; Carlos T Z Cerski; Cesar Liberato Petzhold; Sidia M Callegari-Jacques; Sérgio G S Barros Journal: Surg Endosc Date: 2009-02-28 Impact factor: 4.584