1. Department of Public Health; Kaohsiung Medical University; Kaohsiung Taiwan
2. Department of Otorhinolaryngology; School of Medicine; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Otorhinolaryngology; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
4. Department of Otorhinolaryngology; Kaohsiung Municipal Hsiao-Kang Hospital; Kaohsiung Taiwan
5. Department of Family Medicine; School of Medicine; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
6. Department of Family Medicine; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
7. Department of Family Medicine; Kaohsiung Municipal Ta-Tung Hospital; Kaohsiung Taiwan
8. School of Nursing; National Yang-Ming University; Taipei Taiwan
9. Department of Health Promotion and Health Education; National Taiwan Normal University; Taipei Taiwan