Hajare, R. B., Nagarwala, R., Shyam, A., & Sancheti, P. (2018). Correlation between 6-minute walk distance and spirometry parameters in stable chronic obstructive pulmonary disease patients. International Journal of Research in Medical Sciences, 7(1), 34–39. https://doi.org/10.18203/2320-6012.ijrms20185359