Rodríguez-Julbe, María C., Carlos H. Ramírez-Ronda, Elba Arroyo, Gisela Maldonado, Sonia Saavedra, Bebelín Meléndez, Glenda González, and Javier Figueroa. 2004. “Antibiotics in Older Adults”. Puerto Rico Health Sciences Journal 23 (1). https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/416.