1. Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany
2. Institute for Experimental Molecular Imaging, RWTH Aachen University, Forckenbeckstraße 55, 52074 Aachen, Germany
3. Institute for Pathology, Electron Microscopy Facility, University Hospital RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany