Gupta Dheeraj, Agarwal Ritesh, Aggarwal Ashutosh Nath, Singh Navneet, Mishra Narayan, Khilnani G C, Samaria J K, Gaur S N, Jindal S K
Department of Pulmonary Medicine, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, India.
Lung India. 2012 Jul;29(Suppl 2):S27-62. doi: 10.4103/0970-2113.99248.