1. Department of Otology and Neurotology; Roger Salengro Hospital; Lille University Hospital; Lille France
2. Department of Anatomy; “Henri Warembourg” Faculty of Medicine; University of Lille; Lille France
3. Department of Neurosurgery; Roger Salengro Hospital; Lille University Hospital; Lille France
4. Department of Radiology; Claude Huriez Hospital; Lille University Hospital; Lille France