1. Department of Medicine (J.-G.S., R.N., C.E.), University of Göttingen, D-37099 Göttingen, Germany
2. Institute of Pathology (F.D.), University of Magdeburg, D-39120 Magdeburg, Germany
3. Dipartimento di Biologia Sperimentale, Ambientale e Applicata (I.D.), Università di Genova, I-16132 Genova, Italy
4. Children’s Hospital (B.K., T.B.), Department of Biochemistry, University of Hamburg, D-20246 Hamburg, Germany