1. Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia
2. Department of Biochemistry, Blood Transfusion Centre of Slovenia, 1000 Ljubljana, Slovenia
3. Department of Neurosurgery, University Medical Centre, University of Ljubljana, 1000 Ljubljana, Slovenia
4. Department of Biomedicine, University of Bergen, 5009 Bergen, Norway
5. Division of Neurosurgical Research, Department of Neurosurgery, University of Heidelberg, 69120 Heidelberg, Germany
6. NorLux Neuro-Oncology Laboratory, Centre de Recherche Public de la Santé, 1526 Luxembourg, Luxembourg
7. Department of Biochemistry, Faculty of Chemistry and Chemical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia