1. Homberg/Saar and Mainz, Germany
2. Departments of Otorhinolaryngology
3. Orthodontics
4. Psychiatry and Psychotherapy
5. Hospitals of the University of the Saarland, Homburg/Saar, Germany; and the Institute of Medical Biometry, Epidemiology, und Informatics, Johannes Gutenberg University, Mainz, Germany.