1. Department of Allergy and Clinical Immunology; Clinica Universidad de Navarra; Pamplona Spain
2. Allergy Service; Basurto Hospital; Bilbao Spain
3. Murcia Department of Health; Center of Health Technology Innovation; Murcia Spain
4. Department of Socio-Sanitary Sciences; Medical School; University of Murcia; Murcia Spain
5. Department of Preventive Medicine; Clinica Universidad de Navarra; Pamplona Spain
6. Navarra's Health Research Institute IDISNA; Pamplona Spain