Araujo SEA, Sousa Jr AH da S e, Campos FGCM de, et al. Conventional approach x laparoscopic abdominoperineal resection for rectal cancer treatment after neoadjuvant chemoradiation: results of a prospective randomized trial . Rev. Hosp. Clín. 2003;58(3):133-140. doi:10.1590/S0041-87812003000300002