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