1. Department of General Surgery, Konyang University Hospital, Daejeon, Korea.
2. Department of Pathology, Konyang University Hospital, Daejeon, Korea.
3. Department of Radiology, Konyang University Hospital, Daejeon, Korea.
4. Department of Pharmacology, Konyang University Hospital, Daejeon, Korea.
5. Department of Thoracic Surgery, China-Japan Friendship Hospital, Beijing 100029, China.
6. Department of Anesthesiology & Pain Medicine, Konyang University Hospital, Daejeon, Korea.