1 Allergy Service, University Hospital of Salamanca, Salamanca, Spain.
2 Institute for Biomedical Research of Salamanca, IBSAL, Salamanca, Spain.
3 Department of Biomedical and Diagnostic Sciences, Faculty of Medicine, University of Salamanca, Salamanca, Spain.
4 Asthma, Allergic and Adverse Reactions (ARADyAL) Network for Cooperative Research in Health of Instituto de Salud Carlos III, Salamanca University Hospital, Salamanca, Spain.