1. Department of Pulmonary, Critical Care and Sleep Medicine, All India Institute of Medical Sciences (AIIMS), New Delhi, India
2. Department of Medicine, All India Institute of Medical Sciences (AIIMS), New Delhi, India
3. Department of Radiodiagnosis, All India Institute of Medical Sciences (AIIMS), New Delhi, India
4. Department of Nuclear Medicine, All India Institute of Medical Sciences (AIIMS), New Delhi, India
5. Department of Pathology, VMMC and Safdarjung Hospital, New Delhi, India