Factors associated to the practice of using masks by the population of Paraíba during the COVID-19 pandemic - Pereira-Ávila, Fernanda Maria Vieira; Lam, Simon Ching; Gir, Elucir; Góes, Fernanda Garcia Bezerra; Freire, Maria Eliane Moreira; Silva, Ana Cristina de Oliveira e (Revista da Escola de Enfermagem da Universidade de São Paulo, 2021)