1. Center for Pediatric Oncology and Hematology, Vilnius University Hospital Santaros Klinikos, Santariskiu Str. 4, LT-08406 Vilnius, Lithuania
2. Life Sciences Center, Vilnius University, Sauletekio Ave. 7, LT-10257 Vilnius, Lithuania
3. Department of Biobank, National Cancer Institute, Santariskiu Str. 1, LT-08406 Vilnius, Lithuania
4. Princess Máxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands
5. Department of Reproductive Medicine, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
6. Faculty of Medicine, Vilnius University, M. K. Ciurlionio Str. 21/27, LT-03101 Vilnius, Lithuania
7. Division of Child Health, UMCU-Wilhelmina Children’s Hospital, 3584 EA Utrecht, The Netherlands