1. Division of Family Medicine, Taipei Hospital, Ministry of Health and Welfare, New Taipei City, Taiwan
2. Department of Family Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
3. Chest Department, Taipei Veterans General Hospital, Taipei, Taiwan
4. School of Medicine, National Yang-Ming University, Taipei, Taiwan
5. Department of Family Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
6. Department of Surgery, Kaohsiung Veterans General Hospital, Pingtung Branch, Pingtung, Taiwan
7. Institute of Hospital and Health Care Administration, School of Medicine, National Yang-Ming University, Taipei, Taiwan