1. Department of Plastic, Reconstructive; Aesthetic, and Hand Surgery, University Hospital Basel; Basel Switzerland
2. Department of Neuropathology; Institute of Pathology, University Hospital Basel; Basel Switzerland
3. Department of Biomedicine; University of Basel; Basel Switzerland
4. Department of Biomedical Engineering; Center for Bioengineering and Regenerative Medicine, University of Basel, Gewerbestrasse 14, 4123; Allschwil Switzerland
5. Department of Spinal Surgery; University Hospital Basel; Basel Switzerland