1. School of Oral HygieneCollege of Oral MedicineTaipei Medical UniversityTaipei Taiwan
2. Department and Graduate Institute of Health Care ManagementChang Gung UniversityTao‐Yuan Taiwan
3. Department of Health Industry ManagementSchool of Health Care Management, Kainan UniversityTaoyuan Taiwan
4. Keelung City Public Health BureauKeelung Taiwan
5. Tainan City Public Health BureauTainan Taiwan
6. Division of GastroenterologyDepartment of Internal MedicineShin‐Kong Wu Ho‐Su Memorial HospitalTaipei Taiwan
7. School of MedicineFu‐Jen Catholic UniversityNew Taipei City Taiwan
8. Changhua County Public Health BureauChanghua Taiwan
9. Department of Internal MedicineCollege of Medicine, National Taiwan UniversityTaipei Taiwan
10. Graduate Institute of Epidemiology and Preventive MedicineCollege of Public Health, National Taiwan UniversityTaipei Taiwan