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