1. Department of Gastroenterological Surgery Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
2. Department of General Thoracic Surgery, Breast and Endocrinological Surgery Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
3. Department of Bioinformatics Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan