Behera D, Sehgal Inderpaul Singh
Department of Pulmonary Medicine (WHO Collaborating Centre for Research & Capacity Building in Chronic Respiratory Diseases) Postgraduate Institute of Medical Education & Research, Chandigarh 160 012, India.
Indian J Med Res. 2015 Apr;141(4):380-2. doi: 10.4103/0971-5916.159237.