“The predictive value of handheld peak expiratory flow metre and IPAG questionnaire as a screening tool for COPD among high-risk patients”, NFMJ, vol. 1, no. 2, pp. 86–93, Sep. 2024, Accessed: Sep. 22, 2024. [Online]. Available: https://nfmjournal.org/index.php/nfmj/article/view/13