Sharma, Divyendu, Rajesh Agrawal, Rajat Agarwal, Amit Kumar, and Utkarsh Gupta. 2019. “Usual Interstitial Pneumonia - Secondary Vs Idiopathic Pulmonary Fibrosis”. International Journal of Research in Medical Sciences 8 (1):20-24. https://doi.org/10.18203/2320-6012.ijrms20195645.