Toro, Doris H., and Ivonne M. Figueroa-Rivera. “Treatment Failure With Direct Antiviral Agents in Patients With Hepatitis C Virus Genotype 1 Infection at the Veteran Affairs Caribbean Healthcare System in San Juan, Puerto Rico”. Puerto Rico Health Sciences Journal 38, no. 4 (December 4, 2019). Accessed October 31, 2025. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1958.