1 Department of Otolaryngology/Head & Neck Surgery, University Hospital Santa Maria della Misericordia, Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy.
2 Department of Health Sciences, University of Genoa, Genoa, Italy.
3 Department of Business Economics, Health and Social care, University of Applied Science and Arts of Southern Switzerland, Manno, Switzerland.
4 School of Nursing and Midwifery, Trinity College Dublin, Dublin, Ireland.