1. Department of Medicine II, Freiburg University Medical Center, Albert Ludwigs University, 79106 Freiburg, Germany
2. Department of Pathology and Laboratory Medicine, Tufts Medical Center and Tufts University School of Medicine, Boston, Massachusetts 02111
3. Department of Pathology, University of Duisburg–Essen, 45122 Essen, Germany
4. Department of Pathology, Helsinki University Central Hospital, 00029 Helsinki, Finland
5. Genomic Medicine Institute, Lerner Research Institute and Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio 44195
6. Section for Preventive Medicine, University Medical Center, Albert Ludwigs University, 79106 Freiburg, Germany