1. Department of Paediatrics; University of Jena Medical School; Jena Germany
2. MVZ Labor PD Dr. Volkmann und Kollegen; Karlsruhe Germany
3. Department of Internal Medicine II; Klinikum Chemnitz; Chemnitz Germany
4. Department of Medicine I; University of Mainz Medical School; Mainz Germany
5. Department of Medical Biochemistry and Immunology; University Hospital of Wales; Cardiff UK