Bhupendra Kumar Jain, Ashwin Songra. A cross-sectional study to investigate short duration toxic consequences of smoking to lungs of asymptomatic smokers through spirometry and 6 min walk test. Asian J Med Sci [Internet]. 2022 Aug. 1 [cited 2024 May 2];13(8):179-85. Available from: https://nepjol.info/index.php/AJMS/article/view/43972