Fouladi Dehaghi Behzad, Ghodrati-Torbati Abbas, Teimori Gholamheidar, Ibrahimi Ghavamabadi Leila, and Jamshidnezhad Amir. “Face Masks Vs. COVID-19: A Systematic Review”. Investigación y Educación en Enfermería 38, no. 2 (July 10, 2020). Accessed July 27, 2021. https://revistas.udea.edu.co/index.php/iee/article/view/342800.