1. Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Valencia, Spain;
2. Department for Preventive Dentistry, Parodontology and Cariology, University Medical Center, Göttingen, Germany;
3. Institute of Anatomy and Embryology, University Medical Center, Göttingen, Germany;
4. Biomaterials and Nanomedicine (CIBER-BBN), Biomedical Research Networking Centre in Bioengineering, Valencia, Spain