1. Department of Thoracic and Visceral Organ Surgery, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
2. Department of Oncology Clinical Development, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
3. Department of Dermatology, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
4. Department of Diagnostic Pathology, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan