1. Department of Prosthodontics; School of Dentistry; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
2. Division of Oral Rehabilitation; Faculty of Dental Science; Kyushu University; Fukuoka Japan
3. Division of Prosthodontics; School of Dentistry; University of Michigan; Ann Arbor Michigan
4. Division of Bio-Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan