1. Department of Gastroenterology, Graduate School of MedicineChiba University Chiba City Chiba Japan
2. Department of Biochemistry and Genetics, Graduate School of MedicineChiba University Chiba City Chiba Japan
3. Port Square Kashiwado Clinic, Kashiwado Memorial Foundation Chiba City Chiba Japan
4. Department of NeurologyKashiwado Hospital Chiba City Chiba Japan
5. Department of Molecular Diagnosis, Graduate School of MedicineChiba University Chiba City Chiba Japan
6. Department of Academic Surgery, Graduate School of MedicineChiba University Chiba City Chiba Japan