1. University Medical Center Carl Gustav Carus, TU Dresden; Dresden Germany
2. German Diabetes Center; Institute for Biometry and Epidemiology; Duesseldorf Germany
3. Hiller Center for Research in Rheumatology; Duesseldorf Germany
4. Hietzing Hospital; Vienna Austria
5. Heinrich-Heine-University; Düsseldorf Germany
6. Medical University of Vienna and Hietzing Hospital; Vienna Austria
7. Toronto Western Hospital; Mount Sinai Hospital; and University of Toronto; Toronto Canada
8. University of California; San Francisco
9. Charité University Hospital; Berlin Germany
10. University of Crete Medical School; Heraklion Greece