1 Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University-Yangming Campus, Taipei, Taiwan.
2 Hepatitis Research Centre, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei 100225, Taiwan; Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei 100225, Taiwan; Department of Internal Medicine, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei 100225, Taiwan. Electronic address: cjliu@ntu.edu.tw.