Acosta, Dionisio L., Chelsea N. Fair, Cinthia M. Gonzalez, Maite Iglesias, Nataly Maldonado, Nathan Schenkman, Samuel M. Valle, Jorge L. Velez, and Luis Mejia. 2019. “Nonmedical Use of D-Amphetamines and Methylphenidate in Medical Students”. Puerto Rico Health Sciences Journal 38 (3). https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1790.