1. Department of Cardiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
2. Department of Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India
3. Department of Radiology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
4. Department of Cardiology, Vivekananda Hospital, Durgapur, West Bengal, India