1. Department of Nuclear Medicine; University Hospital of Leipzig; Leipzig Germany
2. Institute of Medical Statistics; Informatics and Epidemiology; University of Leipzig; Leipzig Germany
3. Clinic of Nuclear Medicine; National Hospital for Active Treatment in Oncology; Sofia Bulgaria
4. Division of Pediatric Hematology and Oncology; Department of Pediatrics; Charité Berlin; Berlin Germany
5. Department of Nuclear Medicine; Charité - Universitätsmedizin Berlin; Berlin Germany
6. Department of Pediatric Hematology and Oncology; Medizinische Hochschule Hannover; Hannover Germany
7. Department of Nuclear Medicine; Medizinische Hochschule Hannover; Hannover Germany
8. University Children's Hospital Münster; Pediatric Hematology and Oncology; Münster Germany
9. Division of Pediatric Hematology and Oncology; Department of Pediatrics; Justus-Liebig University of Giessen; Giessen Germany
10. Department of Nuclear Medicine; University Hospital of Münster; Münster Germany
11. Dr. von Hauner University Children's Hospital; LMU Munich; Munich Germany
12. Department of Nuclear Medicine; LMU Munich; Munich Germany
13. Division of Pediatric Hematology and Oncology; Department of Pediatrics (Inselspital) Bern University Hospital; University of Bern; Bern Switzerland
14. Department of Nuclear Medicine; Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
15. Division of Pediatric Hematology and Oncology; Department of Pediatrics; University Hospital Graz; Graz Austria
16. Department of Radiology; Medical University Graz; Graz Austria
17. Department of Pathology; Justus-Liebig University of Giessen; Giessen Germany
18. Department of Pathology; University Hospital of Kiel; Kiel Germany
19. Medical Faculty; Martin-Luther-University of Halle-Wittenberg; Halle Germany