Descriptive statistics. Revista Alergia México, [S. l.], v. 63, n. 4, p. 397–407, 2016. DOI: 10.29262/ram.v63i4.230. Disponível em: https://www.revistaalergia.mx/ojs/index.php/ram/article/view/230. Acesso em: 24 sep. 2026.