1. Department of Otolaryngology and Head and Neck Surgery Sainte‐Anne Military Teaching Hospital Toulon Cedex 9 France
2. Ecole du Val‐de‐Grâce French Military Health Service Academy Paris Cedex 5 France
3. Val‐de‐Grâce Military Academy Paris Cedex 5 France
4. Neurosurgery Department Sainte‐Anne Military Teaching Hospital Toulon Cedex 9 France