1. Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
2. Restorative Dentistry, King’s College London Dental Institute, King’s College London
3. Faculty of Dentistry, Bangkok Thonburi University
4. Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiangmai University