1 Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich, Switzerland.
2 Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Christine Kühne Center for Allergy Research and Education CK-CARE, Davos, Switzerland.
3 Department of Dermatology, University of California, Davis, Sacramento, Calif.
4 Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Christine Kühne Center for Allergy Research and Education CK-CARE, Davos, Switzerland. Electronic address: [email protected].