Gómez Gonzales, W.E., Cieza Macedo, E.C. and Diaz Robles, D.A. 2022. Letter to the editor: Use of face masks and heart rate in adults aged 18 to 60 years. Revista Peruana de Ciencias de la Salud. 4, 4 (Dec. 2022), 277–278. DOI:https://doi.org/10.37711/rpcs.2022.4.4.387.