El Burai Félix S, Mack KA, Jones CM. Trends in the Distribution of Opioids in Puerto Rico, 1999-2013. PRHSJ [Internet]. 2016 Sep. 2 [cited 2025 Nov. 5];35(3):165-9. Available from: https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1346