1. Forschungszentrum Jülich GmbH, Institute of Neuroscience and Medicine, Nuclear Chemistry (INM-5), Jülich, Germany
2. University of Cologne, Faculty of Medicine and University Hospital Cologne, Institute of Radiochemistry and Experimental Molecular Imaging, Cologne, Germany
3. Institute of Neurophysiology, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
4. Department of Neurosurgery, RWTH Aachen University, Aachen, Germany