1. Institute for Pathology, University Hospital Bonn, 53127 Bonn, Germany
2. Institute for Medical Biometry, Informatics and Epidemiology, Medical Faculty, University of Bonn, 53127 Bonn, Germany
3. Department of Orthopedics and Trauma Surgery, University Hospital Bonn, 53127 Bonn, Germany
4. Department of Medicine III, University Hospital Bonn, 53127 Bonn, Germany
5. Core Unit for Bioinformatics Data Analysis, Medical Faculty, University of Bonn, Venusberg-Campus 1, 53127 Bonn, Germany