1. Department of Biological and Macromolecular MaterialsFraunhofer Institute for Microstructure of Materials and Systems IMWSWalter‐Huelse‐Str. 1 Halle (Saale) 06120 Germany
2. Translational Centre for Regenerative MedicineUniversity of LeipzigLeipzig Germany
3. University of Tennessee Health Science CenterUniversity of Tennessee910 Madison Ave. Memphis Tennessee 38163
4. Department of Veterinary MedicineUniversity of LeipzigLeipzig Germany
5. Department of General SurgeryBG Klinikum Bergmannstrost HalleHalle Germany
6. Department of NeurosurgeryBG Klinikum Bergmannstrost HalleHalle Germany
7. Department of NeurosurgeryUniversity Hospital and University of HelsinkiHelsinki Finland