1. Department of Thoracic, Breast and Endocrine Surgery, Faculty of Medicine, Kagawa University,Kagawa 761‑0793, Japan
2. Department of Diagnostic Pathology, Kagawa University Hospital, Kagawa 761‑0793, Japan
3. Department of Surgery, Takamatsu Red Cross Hospital, Takamatsu, Kagawa 760‑0017, Japan
4. Department of Medical Oncology, Shiga University of Medical Science, Otsu, Shiga 520‑2191, Japan