1. Department of Operative Dentistry; Center for Dentistry and Oral Medicine (Carolinum); Goethe University Frankfurt; Frankfurt Germany
2. Klinikum der Universität München; Institut für Didaktik und Ausbildungsforschung in der Medizin; München Germany
3. Department of Operative Dentistry and Periodontology; University Medical Center Freiburg; Medical School and Hospital; Freiburg Germany
4. Department of Assessment; Medizinische Hochschule Brandenburg Theodor Fontane; Neuruppin Germany