Hajare, Ruchita B., Raziya Nagarwala, Ashok Shyam, and Parag Sancheti. 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.