1. Section of Hematology, Department of Pediatrics, Faculty of Medicine; Gazi University; Ankara Turkey
2. Department of Ophthalmology; Faculty of Medicine; Gazi University; Ankara Turkey
3. Institute of Human Genetics; University Medical Centre of the Johannes Gutenberg University Mainz; Mainz Germany
4. Department of Dermatology; Freiburg University Medical Center; Freiburg Germany
5. Institute of Human Genetics; University of Heidelberg; Heidelberg Germany