Vera-Montoya, Maira, Lina Marín-Gavina, and José Andrés Cálvache. “Critical Appraisal of ‘Prescription of Long-Acting Opioids and Mortality in Patients With Chronic Nonmalignant Pain’”. Colombian Journal of Anesthesiology 44, no. 4 (October 1, 2016): 330–333. Accessed April 19, 2024. https://www.revcolanest.com.co/index.php/rca/article/view/611.