1. Private Practice; Kassel Germany
2. botiss biomaterials; Berlin Germany
3. Department of anatomy histology and embryology, Faculty of dental medicine and health; University of Osijek; Osijek Croatia
4. Department of Oral Maxillofacial Surgery; Division for Regenerative Orofacial Medicine, University Hospital Hamburg-Eppendorf; Hamburg Germany
5. Justus Liebig University of Giessen; Giessen Germany