A randomized controlled trial (RCT) of 2 dose ratios for conversion from parenteral to oral methadone in patients with cancer pain. - Gonzalez-Barboteo, Jesus; Porta-Sales, Josep; Nabal-Vicuna, Maria; Diez-Porres, Leyre; Canal, Jaume; Alonso-Babarro, Alberto; Vilches, Yolanda; Llorens, Silvia; Sanllorente, Mireia; Perez-Pujol, Silvia; Bruera, Eduardo (JOURNAL OF CLINICAL ONCOLOGY, 2016)