1. Department of Allergy and Immunology IIS‐Fundación Jiménez Díaz, UAM Madrid Spain
2. Department of Allergy Fundación Jiménez Díaz University Hospital, UAM Madrid Spain
3. Department of Biochemistry and Molecular Biology UCM Madrid Spain
4. Department of Clinical Analysis Fundación Jiménez Díaz University Hospital, UAM Madrid Spain
5. Clinical Biostatistics Unit, IDIPHIM Puerta de Hierro Majadahonda University Hospital Madrid Spain
6. Allergy Department Hospital Infantil Universitario Niño Jesús, Fundación HNJ, IIS‐P Madrid Spain
7. Allergy Service Guadalajara Hospital Guadalajara Spain
8. Allergy Service Reina Sofía de Córdoba University Hospital‐IMIBIC Córdoba Spain
9. Allergy Service Ramón y Cajal University Hospital Madrid Spain
10. Allergy Department Navarra University Clinic Pamplona Spain
11. Allergy Unit, Allergo‐Anaesthesia Unit Hospital Central de la Cruz Roja Madrid Spain
12. Faculty of Medicine and Biomedicine Alfonso X El Sabio University Madrid Spain