Assessment of the value of 6-min walk test to predict the severity of interstitial lung disease among Indian patients oleh Anantha Krishna Sompalli, Sateesh Rao Kailasa, Varun Pulugundla, Naveen Chandra Reddy Kotha, Pawan Kumar Sharma, Gopala Krishnaiah Velisela, Mohammed Soheb Sadath Ansari