[1] Justus Liebig University Giessen and University Medical Center Giessen and Marburg (Campus Giessen),Department of Paediatric Dentistry, Medical Center for Dentistry
[2] Office of Public Health/Dental Service,Institute for Medical Informatics
[3] Office of Public Health/Dental Service,Department of Operative Dentistry, Endodontics, and Pediatric Dentistry, Medical Center for Dentistry
[4] Justus Liebig University Giessen,undefined
[5] Philipps University Marburg and University Medical Center Giessen and Marburg (Campus Marburg),undefined