Affiliation: | (1) Division of Otolaryngology, Department of Specialist Surgical Sciences, Fondazione I.R.C.C.S. Ca’ Granda, Ospedale Maggiore Policlinico, University of Milan, Via F. Sforza 35, 20122 Milan, Italy;(2) King’s College London Dental Institute, London, UK;(3) Department of Statistics, University of Milan, Milan, Italy |