1. Department of Family Medicine, Cheng Hsin General Hospital, Taipei, Taiwan
2. Department of Family Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
3. Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan
4. Division of Thoracic Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
5. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
6. School of Medicine, National Yang-Ming University, Taipei, Taiwan
7. Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan