[1] University Medical Centre,Department of Operative Dentistry and Periodontology, Faculty of Dentistry
[2] University Medical Centre,Department of Medical Biometry and Statistics, Institute of Medical Biometry and Medical Informatics
[3] University Medical Centre,Department of Prosthodontics, Faculty of Dentistry
[4] University of Maryland,Department of Periodontics, School of Dentistry
[5] Private Practice,undefined
[6] Dental Diagnostic Centre,undefined
[7] Abteilung für Zahnerhaltungskunde und Parodontologie,undefined