Journal of Coloproctology (Rio de Janeiro) v.37 n.2 2017 Journal of Coloproctology (Rio de Janeiro. Online) Sociedade Brasileira de Coloproctologia (SBCP) instacron:SBCP Journal of Coloproctology, Vol 37, Iss 2, Pp 128-133 (2017) Journal of Coloproctology (Rio de Janeiro), Volume: 37, Issue: 2, Pages: 128-133, Published: JUN 2017