Ali, M.A. and Salve, V.T. 2017. Measurement of bone mineral density in stable COPD patients using ultrasound densitometry: prevention is better than cure. International Journal Of Community Medicine And Public Health. 4, 10 (Sep. 2017), 3554–3560. DOI:https://doi.org/10.18203/2394-6040.ijcmph20174121.