1. Department of Clinical EngineeringSaiseikai Kumamoto Hospital Kumamoto Japan
2. Graduate School of MedicineOita University Oita Japan
3. Division of NephrologySaiseikai Kumamoto Hospital Kumamoto Japan
4. Division of Gastroenterology & HepatologySaiseikai Kumamoto Hospital Kumamoto Japan
5. Sato Hospital Oita Japan
6. Department of AnesthesiologyFaculty of Medicine, Oita University Oita Japan