1. Tenri Institute of Medical Research
2. Department of Abdominal Surgery, Tenri Hospital
3. Takahashi Family Clinic
4. Department of Ophthalmology, University of Louisville School of Medicine, KY, USA
5. Department of Pancreaticobiliary Surgery, Graduate School of Medicine, Tohoku University
6. Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University