Carmona-Matos, Danilea M., et al. “Evaluating the Levels of Awareness of and Attitudes on Advance Directives Among Primary Care Physicians in Puerto Rico”. Puerto Rico Health Sciences Journal, vol. 41, no. 3, Aug. 2022, pp. 135-41, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/2698.