1. Rhinology Unit, Department of Otolaryngology, Head and Neck Surgery, Virgen Macarena University Hospital, 41009 Seville, Spain
2. Biomedical Engineering Group, University of Seville, 41004 Seville, Spain
3. Rhinology and Asthma Unit, Department of Otolaryngology, Jerez University Hospital, 11407 Jerez, Spain
4. Department of Otolaryngology—Head & Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
5. Department of Surgery, School of Medicine, University of Seville, 41009 Seville, Spain