1. Institute of Human Genetics; University Hospital Magdeburg, Otto-von-Guericke University; Magdeburg Germany
2. Institute of Human Genetics; University Medical Center Goettingen, Georg-August University; Goettingen Germany
3. Institute of Human Genetics; University of Cologne; Cologne Germany
4. Department of Clinical Genetics; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark
5. Department of Medical Genetics, Faculty of Medicine; Gazi University; Ankara Turkey
6. Section of Hematology, Department of Pediatrics, Faculty of Medicine; Gazi University; Ankara Turkey
7. Institute of Biochemistry and Molecular Biology II, Medical Faculty; Heinrich-Heine-University; Düsseldorf Germany
8. Department of Ophthalmology; University of Cologne; Cologne Germany
9. Department of Dermatology; University of Cologne; Cologne Germany
10. Department of Ophthalmology; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark
11. Institute of Human Genetics; University Medical Centre of the Johannes Gutenberg University Mainz; Mainz Germany