1. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
2. Otorhinolaryngology Unit, Humanitas Clinical and Research Center, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS), Rozzano, Milan, Italy
3. Biostatistics Unit, Humanitas Clinical and Research Center, IRCCS, Rozzano, Milan, Italy
4. Clinical Quality Department, Humanitas Clinical and Research Center, IRCCS, Rozzano, Milan, Italy