Ju-Yi Chen1, Yi-Shan Tsai2, Yi-Heng Li3. 1. Department of Internal Medicine, Hospital and College of Medicine, National Cheng Kung University, 138 Sheng Li Road, Tainan 704, Taiwan. 2. Department of Diagnostic Radiology, Hospital and College of Medicine, National Cheng Kung University, Tainan, Taiwan. 3. Department of Internal Medicine, Hospital and College of Medicine, National Cheng Kung University, 138 Sheng Li Road, Tainan 704, Taiwan heng@mail.ncku.edu.tw.