Sunyal, D. K., Amin, M. R., Yasmin, A., Molla, G. M., Ali, M. L., & Sultana, M. (2012). Study of Forced Expiratory Volume in First Second (FEV1) and Ratio of Forced Expiratory Volume in First Second and Forced Vital Capacity in Percentage (FEV1/FVC%) in Pregnant Women. Journal of Enam Medical College, 2(1), 29–32. https://doi.org/10.3329/jemc.v2i1.11926