1 Department of Dermatology and Venereology, University Hospital Centre (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland.
2 Department of Immunology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
3 Department of Dermatology and Venereology, University Hospital Centre (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland; Department of Immunology, University Hospital Zurich, University of Zurich, Zurich, Switzerland; Department of Dermatology, Hospital 12 de Octubre, Medical School, University Complutense, Madrid, Spain. Electronic address: emmanuella.guenova@unil.ch.