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. Assistant Professor, School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
4. Associate Professor, Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan, ROC
5. Private practice, Kaohsiung, Taiwan, ROC
6. Professor, School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC