1. Center for Oral Diseases, Fukuoka Dental College, Fukuoka
2. Section of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka
3. Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka
4. Division of Operative Dentistry, College of Dental Medicine, Rangsit University, Pathum Thani
5. Section of Oral Implantology, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka