1. Section of Periodontology, Department of Conservative Dentistry, Clinic for Oral, Dental and Maxillofacial Diseases, Heidelberg Faculty of Medicine Heidelberg University Heidelberg Germany
2. Section of Endodontology and Dental Traumatology, Department of Conservative Dentistry, Clinic for Oral, Dental and Maxillofacial Diseases, Heidelberg Faculty of Medicine Heidelberg University Heidelberg Germany