1. From the Department of Medical Informatics, Biometry and Epidemiology, Free University Berlin, Berlin, Germany; the2Berlin Centre for Public Health, Berlin, Germany; the
2. Department of Ophthalmology, University of Erlangen-Nu¨rnberg, Erlangen, Germany; the
3. Department of Ophthalmology, Faculty of Clinical Medicine Mannheim, University of Heidelberg, Mannheim, Germany; and the
4. Institute of Medical Biometry and Statistics, Medical University of Lu¨beck, Lu¨beck, Germany.
5. From the Department of Medical Informatics, Biometry and Epidemiology, Free University Berlin, Berlin, Germany; the