1. Division of Cardiology, Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan
2. School of Medicine, College of Medicine, National Sun Yat-sen University, Kaohsiung, Taiwan
3. Division of Cardiology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
4. Division of Cardiology, Department of Internal Medicine, Jen-Ai Hospital, Taichung, Taiwan