1. Department of Biomedical Sciences and Engineering, National Central, University, Taoyuan 32001, Taiwan R.O.C
2. Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan R.O.C
3. School of Medicine, Faculty of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan R.O.C
4. Department of Biomedical Engineering, National Yang Ming Chiao Tung University, Taipei, Taiwan R.O.C
5. Department of Chemical and Materials Engineering, National Central University, Taoyuan, Taiwan R.O.C