Jérôme Waterval1, Romain Kania2, Thomas Somers3. 1. Department of Otorhinolaryngology, Radboud University Medical Center, Netherlands. 2. Department of ENT, Lariboisiere University Hospital, APHP, Paris Sorbonne University, Paris, France. 3. Department of ENT, Sint-Augustinus Ziekenhuis, Wilrijk, Antwerp, Belgium.