Shaheen, S., Gangwar, V., John, N. A., & Gupta, S. (2020). An Observational Study of Variation in the Pulmonary Functions with the Phases of Menstrual Cycle in Females of Different Age Groups. International Journal of Clinical and Experimental Physiology, 7(1), 22-26. https://doi.org/10.5530/ijcep.2020.7.1.6