[1] University Hospital,Department of Orthodontics and Dentofacial Orthopedics
[2] Ludwig-Maximilians University Munich,Department of Conservative Dentistry and Periodontology
[3] University Hospital,Institute of Medical Biometry and Epidemiology
[4] Ludwig-Maximilians University Munich,Department of Orthodontics, Section of Preventive and Paediatric Dentistry
[5] Ludwig-Maximilians University of Munich,Clinic for Operative Dentistry, Periodontology and Preventive Dentistry
[6] University Hospital,Department of Odontology
[7] University Hospital RWTH Aachen,Clinic of Periodontology, Endodontology and Cariology
[8] University of Copenhagen,Department of Operative Dentistry and Periodontology, Faculty of Dentistry
[9] University Centre for Dental Medicine Basel,School of Dental Medicine
[10] University of Basel,Department of Dentistry
[11] University Medical Centre,Department of Dermatology
[12] University of Bern,Poliklinik für Zahnerhaltung und Parodontologie
[13] Radboud University Medical Centre,undefined
[14] Inselspital - Bern University Hospital,undefined
[15] Klinikum der Universität München,undefined
[16] LMU München,undefined