1. Department of Surgery Kathmandu University School of Medical Sciences Dhulikhel Nepal
2. Kathmandu University School of Medical Sciences Dhulikhel Hospital Dhulikhel Nepal
3. Department of Medicine Kathmandu University School of Medical Sciences Dhulikhel Nepal
4. Cardio‐Thoracic and Vascular Surgery Unit, Department of Surgery Kathmandu University School of Medical Sciences Dhulikhel Nepal