Akhter S, Mustafa E, Salehin M, Yeasmin N, Amin MR. Study of FVC,FEV1 & FEV1/FVC% in adult male smokers. Bangla J Med [Internet]. 2015 Nov. 10 [cited 2025 Oct. 6];26(2):61-6. Available from: https://www.banglajol.info/index.php/BJMED/article/view/25450