1. Department of Biochemistry; Children's Hospital; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Department of Osteology and Biomechanics; University Medical Center Hamburg-Eppendorf; Hamburg Germany
3. Department of Electron Microscopy; Center of Molecular Neurobiology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
4. Department of Orthodontics; University Medical Center Hamburg-Eppendorf; Hamburg Germany
5. Department of Clinical Chemistry; University Hospital Cologne; Cologne Germany
6. Department of Orthopedics; Children's Hospital Hamburg-Altona; Hamburg Germany
7. Department of Medicine; University of Cambridge; Cambridge UK
8. Institute of Biochemistry; Christian-Albrechts-University; Kiel Germany
9. Department of Molecular Medicine; University of Pavia; Pavia Italy