1. Center of Internal Medicine II, University Hospital Brandenburg; Brandenburg Medical School; Brandenburg Germany
2. Department of Anatomy and Experimental Morphology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
3. Institute of Hygiene and National Consulting Laboratory for Hemolytic Uremic Syndrome (HUS); University Hospital Münster; Münster Germany
4. I. Department of Medicine; Asklepios Klinik Altona; Hamburg Germany