1. Visiting Staff, Department of Family Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan, ROC
2. Associate Professor, School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
3. Senior Lecturer, School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
4. Assistant Professor, School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
5. Private practice, Kaohsiung, Taiwan
6. Professor and Dean, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC