1 Department of Otolaryngology and Head and Neck Surgery, CHU de Bruxelles, CHU Saint-Pierre, School of Medicine Université Libre de Bruxelles Brussels Belgium.
2 Laboratory of Anatomy and Cell Biology, Faculty of Medicine, Research Institute for Health Sciences and Technology University of Mons (UMONS) Mons Belgium.
3 Department of Radiology, CHU de Bruxelles, CHU Saint-Pierre, School of Medicine Université Libre de Bruxelles Brussels Belgium.