Ríos, Josué L., Jesmari Betancourt, Ideliz Pagán, Carla Fabián, Sonia Y. Cruz, Anaisa M. González, Michael J. González, Winna T. Rivera-Soto, and Cristina Palacios. 2013. “Caffeinated-Beverage Consumption and Its Association With Socio-Demographic Characteristics and Selfperceived Academic Stress in First and Second Year Students at the University of Puerto Rico Medical Sciences Campus (UPR-MSC)”. Puerto Rico Health Sciences Journal 32 (2). https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/808.