1. Department of Family Medicine, Faculty of Medicine Chiang Mai University Chiang Mai Thailand
2. Department of Physiology Cardiac Electrophysiology Unit, Faculty of Medicine Chiang Mai University Chiang Mai Thailand
3. Center of Excellence in Cardiac Electrophysiology Research Chiang Mai University Chiang Mai Chiang Mai Thailand
4. Neurophysiology Unit, Cardiac Electrophysiology Research and Training Center, Faculty of Medicine Chiang Mai University Chiang Mai Thailand
5. Department of Oral Biology and Diagnostic Sciences, Faculty of Dentistry Chiang Mai University Chiang Mai Thailand