Open Access Research Paper Views (1064) Assessment of asthma causes identified by spirometry in Lahore, Pakistan Syed Shahid Imran Bukhari, Zulfiqar Ali Int. J. Biosci. 17(6), 202-217, December 2020. DOI: http://dx.doi.org/10.12692/ijb/17.6.202-217 Keywords: FEV1, FVC, MA, Obstruction, Restriction, Spirometry Details