[1] Copenhagen Univ Hosp Herlev & Gentofte, Dept Dermatol & Allergy, Allergy Clin, Copenhagen, Denmark
[2] Copenhagen Univ Hosp Herlev & Gentofte, Dept Clin Microbiol, Copenhagen, Denmark
[3] Univ Copenhagen, Dept Clin Med, Copenhagen, Denmark
[4] Univ Copenhagen, Herlev & Gentofte Hosp, Dept Dermatol & Allergy, Allergy Clin, Gentofte Hospitalsvej 8, 1st floor, DK-2900 Hellerup, Denmark