1 Department of Otorhinolaryngology (ORL), Head and Neck Surgery, Skåne University Hospital, Lund, Sweden; Department of Clinical Sciences, Lund University, Lund, Sweden. Electronic address: maria.silfverschiold@med.lu.se.
2 Department of Clinical Sciences, Malmö, Health Economics, Lund University, Malmö, Sweden.
3 Department of Otorhinolaryngology (ORL), Head and Neck Surgery, Skåne University Hospital, Lund, Sweden; Department of Clinical Sciences, Lund University, Lund, Sweden.