1. Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital , No. 201, Sec. 2, Shipai Rd., Beitou, Taipei, 11217 Taiwan, R.O.C
2. Institute of Clinical Medicine and Cardiovascular Research Institute, National Yang-Ming Chiao-Tung University , No. 155, Sec. 2, Linong Street, 112 Taipei , Taiwan
3. Cardiovascular Center, Taichung Veterans General Hospital , 1650 Taiwan Boulevard Sect. 4, Taichung, 407219 Taiwan, R.O.C
4. Advanced Applications Department, Abbott , Plymouth, MN , USA
5. National Chung Hsing University , 145 Xingda Rd., South Dist., 402 Taichung , Taiwan