1. Department of Cardiology, School of Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
2. Department of Epidemiology and Biostatistics, School of Public Health, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
3. National Cardiovascular Center of Mongolia, The Third State Central Hospital, Ulaanbaatar 16081, Mongolia
4. Department of Communication Skill, Bio-Medical School, Mongolian National University of Medical Sciences, Ulaanbaatar 14210, Mongolia
5. Cardiac Rhythmology Center of the Third State Central Hospital Mongolia, Ulaanbaatar 16081, Mongolia
6. Nobel Pharmaceutical Company, Ulaanbaatar 16100, Mongolia
7. Cardiovascular Department, University Hospital of Mongolian National University of Medical Sciences, Ulaanbaatar 13270, Mongolia