Vera-Montoya, M. ., Marín-Gavina, . L. ., & Cálvache, J. A. . (2016). Critical appraisal of "Prescription of long-acting opioids and mortality in patients with chronic nonmalignant pain". Colombian Journal of Anesthesiology, 44(4), 330–333. Retrieved from https://www.revcolanest.com.co/index.php/rca/article/view/611