1. Group of Clinical & Experimental Allergy, University of Antioquia, Hospital “Alma Mater de Antioquia”, Medellín, Carrera 51A #62–42, Colombia
2. Academic Group of Clinical Epidemiology (GRAEPIC), University of Antioquia, Medellín, Carrera 51A #62–42, Colombia
3. ORL Quirurgy Medical Unit “UNIMEQ ORL”, Bogotá, Ak. 9 # 116–20, Colombia