The predictive value of handheld peak expiratory flow metre and IPAG questionnaire as a screening tool for COPD among high-risk patients. Nigerian Frontline Medicine Journal, [S. l.], v. 1, n. 2, p. 86–93, 2024. Disponível em: https://nfmjournal.org/index.php/nfmj/article/view/13. Acesso em: 22 sep. 2024.