1. The Heart Center of Chonnam National University Hospital, Chonnam National University Research Institute of Medical Sciences, Gwangju, Korea.
2. Department of Cardiology, Apollo Gleneagles Hospital, Kolkata, India.
3. Department of Cardiology, Chungbuk National University Hospital, Cheongju, Korea.
4. Department of Cardiology, East West Neo Medical Center, Seoul, Korea.
5. Department of Cardiology, Yeungnam University Hospital, Daegu, Korea.