[1] Univ Auvergne, Univ Hosp Ctr, Dept Otolaryngol Head & Neck Surg, F-63000 Clermont Ferrand, France
[2] Univ Auvergne, Univ Hosp Ctr, Dept Gen & Thorac Surg, F-63000 Clermont Ferrand, France
[3] Univ Auvergne, Univ Hosp Ctr, Dept Anesthesia, F-63000 Clermont Ferrand, France
[4] Univ Auvergne, Univ Hosp Ctr, Dept Radiol, F-63000 Clermont Ferrand, France