1. IIS-Fundación Jiménez Díaz, Allergy Department, Madrid, Spain
2. Allergy Unit, Allergo-Anaesthesia Unit, Hospital Central de la Cruz Roja, Faculty of Medicine, Alfonso X El Sabio University, ARADyAL, Madrid, Spain
3. Hospital 12 de Octubre, Allergy Department, Madrid, Spain
4. Hospital Royo Villanova, Allergy Department, Zaragoza, Spain
5. Hospital Virgen de la Concha, Allergy Department, Zamora, Spain
6. ROXALL Medicina España S.A., R and D Department, Zamudio, Bizkaia, Spain