1. Department of PathologyToranomon Hospital Tokyo Japan
2. Department of Pathology, Graduate School of MedicineThe University of Tokyo Tokyo Japan
3. Department of GastroenterologyToranomon Hospital Tokyo Japan
4. Department of GastroenterologyToranomon Hospital Kajigaya Kanagawa Japan
5. Department of PathologyToranomon Hospital Kajigaya Kanagawa Japan
6. Okinaka Memorial Institute for Medical Research Tokyo Japan