1. Departments of Cardiology, Cardiothoracic Centre; All India Institute of Medical Sciences; Ansari Nagar New Delhi 110 029 India
2. Departments of Cardiac Radiology; All India Institute of Medical Sciences; Ansari Nagar New Delhi 110 029 India
3. Department of Pathology; All India Institute of Medical Sciences; Ansari Nagar New Delhi 110 029 India