1. Allergy Unit; Hospital Universitario Fundacion; Alcorcón Madrid Spain
2. Medicine and Surgery Department; Universidad Rey Juan Carlos; Alcorcon Madrid Spain
3. Preventive Medicine and Public Health Department; Universidad Rey Juan Carlos; Alcorcón Madrid Spain
4. Primary Care Health Center Gregorio Marañón; Autonomous Community of Madrid; Alcorcón Madrid Spain
5. Primary Health Center, Granero Vicedo Alcorcón; Autonomous Community of Madrid; Alcorcón Madrid Spain