1. Information and Communications, Nagoya University, Nagoya, Japan
2. Graduate School of Informatics, Nagoya University, Nagoya, Japan
3. Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
4. Chair for Computer Aided Medical Procedures, Technical University of Munich, Munich, Germany
5. Research Center for Medical Bigdata, National Institute of Informatics, Tokyo, Japan