1. Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
2. Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan 70428, Taiwan
3. Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan