Research abstracts Morphine-methadone opioid rotation in cancer patients: analysis of dose ratio predicting factors Share Share on Facebook Share on Twitter Publication year 2009 Author(s) Benitez-Rosario, M. A.; Salinas-Martin, A.; Aguirre-Jaime, A.; Perez-Mendez, L.; Feria, M. Pages 1061-8 Volume 37 Number 6 Share Share on Facebook Share on Twitter Research abstracts