1. Institute of Computer Graphics and Vision, Graz University of Technology (TUG), Graz, Austria
2. BioTechMed-Graz, Graz, Austria
3. Department of Neurosurgery, University Hospital Marburg, Marburg, Germany
4. Computer Algorithms for Medicine (Cafe) Laboratory, Graz, Austria
5. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China