1. Department of Physiology; National Yang-Ming University; Taipei; 11221; Taiwan
2. Cardiovascular Division; Institute of Biomedical Sciences, Academia Sinica; Taipei; 11529; Taiwan
3. Division of Cardiology, Department of Internal Medicine; Taipei Veterans General Hospital; Taipei; 11221; Taiwan
4. Heart Center; Cheng-Hsin General Hospital; Taipei; 11221; Taiwan