1. Department of General Thoracic Surgery; Yokosuka-Kyousai Hospital; Yokosuka Japan
2. Department of Internal Medicine; Yokosuka-Kyousai Hospital; Yokosuka Japan
3. Department of Pathology; Yokosuka-Kyousai Hospital; Yokosuka Japan
4. Department of General Thoracic Surgery; National Cancer Center East Hospital; Kashiwa Japan
5. Department of Surgical Therapeutics; Yokohama City University; Yokohama Japan