1. Institute for Inorganic und Analytical Chemistry, Justus-Liebig-University, Giessen, Germany
2. Medimass Ltd., Budapest, Hungary
3. Neurosurgery Clinic, University of Debrecen, Debrecen, Hungary
4. Neurosurgery Clinic, University Hospital Giessen and Marburg, Giessen, Germany
5. 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary