1 Department of Dermatology and allergy, Danish Anaesthesia Allergy Centre, Allergy Clinic, Gentofte Hospital, Hellerup, Denmark.
2 Department of Clinical Medicine, University of Copenhagen, Hellerup, Denmark.
3 Department of Immunology, Allergology and Rheumatology and Infla-Med Centre of Excellence, Antwerp University Hospital, University of Antwerp, Antwerpen, Belgium.
4 Department of Anesthesia and Intensive Care, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.