Chacon Andrade, E. R.; Lobos Rivera, M. E.; Flores Monterrosa, A. N.; Perez, M. A.; Durón, M. F. Sleep Disorders in University Students During COVID-19: United States of America, Mexico and El Salvador. HS 2022, 22 (1), 199-205. https://doi.org/10.19136/hs.a22n1.4979.