1. Division of Thoracic Surgery, Department of Surgery, Changhua Christian Hospital, Chung Shan Medical University, Taichung, Taiwan
2. Division of Thoracic Surgery, Department of Surgery, Koo Foundation Sun Yat-Sen Cancer Center, Taipei, Taiwan
3. Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital and School of Medicine, National Yang-Ming University, Taipei, Taiwan