1. Department of Pathology, UCMS & GTB Hospital, Associate Professor, Transfusion Medicine and blood centre, AIIMS Guwahati, Delhi, India
2. Department of Pathology, University College of Medical Sciences & GTB Hospital, Delhi, India
3. Department of Anaesthesiology, University College of Medical Sciences & GTB Hospital, Delhi, India
4. Department of Medicine, University College of Medical Sciences & GTB Hospital, Delhi, India,