1 Department of Internal Medicine, National Taiwan University Hospital Bei-Hu Branch, Taipei, Taiwan. Electronic address: chin780508@gmail.com.
2 Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan. Electronic address: kaojh@ntu.edu.tw.