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