(1)
Cadavid-Puentes, A. M.; Bermúdez-Guerrero, F. J. .; Giraldo-Salazar, O.; Muñoz-Zapata, F.; Otálvaro-Henao, J.; Ruíz-Sierra, J.; Alvarado-Ramírez, . J.; Hernández-Herrera, G.; Aguirre-Acevedo, D. C. Comparison of the Effectiveness of Fentanyl Versus Morphine for Severe Postoperative Pain Management. A Randomized, Double Blind, Clinical Trial. Colomb. J. Anesthesiol. 2017, 45, 100-107.