1. Ruhr-Universität Bochum, Photonics and Terahertz Technology, Bochum
2. University Hospital Knappschaftskrankenhaus Bochum-Langendreer, Department of Neurosurgery, Bochum
3. University of Applied Sciences Georg Agricola, Faculty of Electrical Engineering, Information Techno
4. St. Barbara Klinik Hamm-Heesen, Department of Stereotactical Neurosurgery, Hamm