Rectal Cancer after preoperative chemoradiation: analysis of tumor downstaging, sphincter preservation, and quality of life in a randomized study comparing two neoadjuvant regimens. Issue 2 (February 2019) - Araujo, R.O.; Vieira, F.M.; Linhares, E.; Torres, C.C.; Martins, I.; Guaraldi, S.; Valadao, M.; Victorino, A.P.; Melo, A.C.; Ferreira, C.G.; Thuler, L.C.; ,