Spirometry for screening of chronic obstructive pulmonary disease. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 24, n. 2, p. 336–7, 2008. DOI: 10.32385/rpmgf.v24i2.10494. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10494. Acesso em: 18 apr. 2026.