1. Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstraße 30, 48149 Münster, Germany
2. Institute of Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany
3. European Virtual Institute for Speciation Analysis (EVISA), Mendelstraße 11, 48149 Münster, Germany
4. Department of Neurosurgery, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany