Impact of previous abdominal surgery on colorectal laparoscopy results: a comparative clinical study - Arteaga González, I; Martín Malagón, A; López-Tomassetti Fernández, E M; Arranz Durán, J; Díaz Luis, H; Carrillo Pallares, A (Surg Laparosc Endosc Percutan Tech, 2006)