1. School of Medicine, National Yang-Ming University, Taipei, Taiwan
2. Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
3. Department of Nursing, Taipei Veterans General Hospital, Taipei, Taiwan
4. Division of Thoracic Surgery, Department of Surgery, Taichung Veterans General Hospital, Taichung, Taiwan
5. Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan