Pereira-Ávila, Fernanda Maria Vieira, et al. “Factors Associated to the Practice of Using Masks by the Population of Paraíba During the COVID-19 Pandemic”. Revista Da Escola De Enfermagem Da USP, vol. 55, June 2021, p. e03735, https://doi.org/10.1590/S1980-220X2020029403735.