1. School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
2. Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Division of Dentistry for Children and Disabled, Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
4. College Oral Medicine, Chung Shan Medical University, Taichung, Taiwan
5. Taoyuan Township Public Health Center, Kaohsiung City Government, Taiwan
6. Graduate Institute of Oral Health Sciences, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan