1. Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital , No. 201, Sec. 2, Shi-Pai Road, Beitou District, Taipei 112 , Taiwan
2. Cardiovascular Research Center, College of Medicine, National Yang Ming Chiao Tung University , No. 155 Sec. 2, Linong St. Beitou District, Taipei City 112304 , Taiwan
3. Department of Internal Medicine, College of Medicine, National Yang Ming Chiao Tung University , No. 155, Sec. 2, Linong St. Beitou District, Taipei City 112304 , Taiwan
4. Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital , Taipei , Taiwan
5. Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University , Taipei , Taiwan