1. Experimental Research Unit; General University Hospital of Albacete; Albacete Spain
2. CREBA, IRBLLEIDA; Lleida Spain
3. Otorhinolaryngology Service; General University Hospital of Albacete; Albacete Spain
4. Health Center Zone VIII and Faculty of Medicine; Albacete Spain
5. Department of Surgery; Universidad Autónoma de Madrid and Instituto de Investigación Sanitaria - Fundación Jiménez Díaz (IIS-FJD); Madrid Spain