1. Department of Otolaryngology‐Head and Neck Surgery Clinica Omega Zeta Andorra la Vella Andorra
2. Department of Otolaryngology‐Head and Neck Surgery Hospital Nostra Senyora de Meritxell Escaldes‐Engordany Andorra
3. Department of Otolaryngology‐Head and Neck Surgery, Oxford University Hospitals NHS Foundation Trust John Radcliffe Hospital Headington, Oxford UK