1. Theodor-Boveri-Institute/Biocenter, Developmental Biochemistry; Wuerzburg University; Wuerzburg Germany
2. Department of Pathology, Kiel Paediatric Cancer Registry; Christian Albrechts University; Kiel Germany
3. Institute for Pathology; Wuerzburg University; Wuerzburg Germany
4. Department of Pediatric Oncology and Hematology; Saarland University Hospital; Homburg Germany
5. Comprehensive Cancer Center Mainfranken; Wuerzburg University; Wuerzburg Germany