Pérez, Cynthia M., et al. “Feasibility of Collecting Biologic Specimens in Population-Based Surveys: Experiences from the Epidemiology of Hepatitis C in the Household, Adult Population of Puerto Rico Study”. Puerto Rico Health Sciences Journal, vol. 29, no. 1, Feb. 2010, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/146.