1 Department of Anatomy and Cell Biology, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany.
2 Department of Oral and Maxillofacial Surgery, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany.
3 Department of Pathology, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany.
4 Department of Orthopedic and Trauma Surgery, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany ; Department of Orthopaedic and Spine Surgery, AGAPLESION EV. BATHILDISKRANKENHAUS gemeinnützige GmbH, Maulbeerallee 4, 31812 Bad Pyrmont, Germany.