1. Department of Histology and Embryology, Medical Academy, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
2. Department of Pediatrics, Clínica Universidad de Navarra, University of Navarra, 31008 Pamplona, Spain
3. Centre of Neurosurgery, Clinic of Neurology and Neurosurgery, Faculty of Medicine, Vilnius University, 03101 Vilnius, Lithuania
4. Laboratory of Molecular Oncology, National Cancer Institute, 08660 Vilnius, Lithuania