1. Department of Medicine I, Johannes Gutenberg University Medical Center, Mainz, Germany
2. Department of Ophthalmology, Johannes Gutenberg University Medical Center, Mainz, Germany
3. Department of Rheumatology, Hannover Medical School, Hannover, Germany
4. Institute of Medical Biostatistics, Epidemiology and Informatics, Johannes Gutenberg University, Medical Center, Mainz, Germany