1. Department of Operative Dentistry and Periodontology and Center of Dental TraumatologyUniversity Hospital of Würzburg Würzburg Germany
2. Department of Periodontology, Endodontology and CariologyUniversity Center for Dental MedicineUniversity of Basel Basel Switzerland
3. Department of Psychology, Work & Organizational PsychologyUniversity of Würzburg Würzburg Germany
4. Private practice Stuttgart Germany
5. Department of Operative Dentistry, Periodontology and EndodontologyUniversity Hospital of Düsseldorf Düsseldorf Germany