Helton T, Guerrero-Criado A, Huang X, Sigler M. Chronological association of public face mask usage with the progression of coronavirus disease 2019 (COVID-19) pandemic in a medium-sized Texas city. The Chronicles [Internet]. 2021Oct.22 [cited 2024Nov.3];9(41):20-7. Available from: https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/775