Institurional affiliations
1. Department of Radiation Oncology, Fukushima Medical University School of Medicine, Fukushima, Japan
2. Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
3. Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan