1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei 10002, Taiwan; Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan. Electronic address: david.ntuh@gmail.com.
2 School of Computing and Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada.
3 Institute of Applied Mathematical Sciences, National Taiwan University, Taipei, Taiwan.