Herrera, Carlos, Julio Betancourt Cervantes, Agustín Lage Dávila, Eligio Barreto Fiu, Lizet Sánchez Valdés, Elibet Chávez González, and Armando Caballero López. “Variables Associated With Severity in COVID-19 Patients”. International Journal of Medical and Surgical Sciences 8, no. 3 (August 10, 2021): 1–15. Accessed December 7, 2024. https://revistas.uautonoma.cl/index.php/ijmss/article/view/1612.