1. Department of Cardiac Surgery, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
2. Department of Public Health, North South University, Dhaka, Bangladesh
3. Department of Community Medicine, CARe Medical College, Dhaka, Bangladesh
4. Department of Cardiac Anaesthesia, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
5. Department of Cardiac Surgery, National Institute of Cardiovascular Diseases, Dhaka, Bangladesh