1. Department of Dermatology and Venereology; Aarhus University Hospital; Aarhus Denmark
2. National Allergy Research Centre; Department of Dermatology and Allergy; Copenhagen University Hospital Gentofte - Herlev; Kildegaardsvej 28 2900 Hellerup Denmark
3. Department of Dermatology and Allergy; Odense University Hospital; Odense Denmark