FEV1 % and FEV1/FVC % in smokers with special reference to Chronic Obstructive Pulmonary Diseases. Int Jour of Biomed Res [Internet]. 2012 Nov. 1 [cited 2024 Oct. 18];3(10):405-8. Available from: https://ssjournals.co.in/index.php/ijbr/article/view/776