1. Department of Radiology and Neuroradiology, Sana Kliniken Duisburg, Duisburg, Germany
2. Department of Diagnostic and Interventional Neuroradiology, Medical School Hannover, Hannover, Germany
3. Department of Orthodontics, University of Mainz, Mainz, Germany
4. Department of Medical Biostatistics, Epidemiology and Informatics, University of Mainz, Mainz, Germany