Agra, G.; Fernandes, M. A. .; Carvalho dos Santos Platel, I.; Calazans Balbino Barros, N. .; Moreira Freire, M. E. Intestinal Constipation in Patients With Advanced Oncological Disease in Use of Opioides: DOI: 10.15343/0104-7809.2013374471478. Mundo Saude 2013, 37, 471-478.