1. Department of Thoracic Surgery, Shinkomonji Hospital, Kitakyushu, Fukuoka, Japan
2. Department of Thoracic Surgery, Shinyukuhashi Hospital, Yukuhashi City, Fukuoka, Japan
3. Department of Thoracic Surgery, Fukuoka-Wajiro Hospital, Higashi-ku, Fukuoka, Japan
4. Department of Surgery, Imamitsu Homecare Clinic, Kitakyushu, Fukuoka, Japan