1. Division of Oral Function and Rehabilitation, Department of Oral Health Science; Nihon University School of Dentistry at Matsudo; Matsudo Japan
2. Department of Psychiatry; Nihon University School of Medicine; Tokyo Japan
3. Department of Oral Health Sciences; KU Leuven; Leuven Belgium
4. Department of Dentistry; University Hospital Leuven; Leuven Belgium
5. Faculty of Dental Medicine; Université de Montréal; Montreal Québec Canada