1. Department of Otorhinolaryngology—Head and Neck Surgery, University Medical Centre of Grenoble, Grenoble, France
2. Department of Otolaryngology—Head and Neck Surgery, Union Memorial Hospital, Baltimore, Maryland, USA
3. Department of Thoracic Surgery, University Medical Centre of Grenoble, Grenoble, France
4. Institut National de la Santé et de la Recherche Médicale U823, Centre for Research ‘Albert Bonniot’, Grenoble, France