Factors associated with the occurrence of leaks in stapled rectal anastomoses: a review of 1 014 patients. - Vignali,A.; Fazio,V.W.; Lavery,I.C.; Milsom,J.W.; Church,J.M.; Hull,T.L.; Strong,S.A.; Oakley,J.R. (J Am Coll Surg, 1997)