Corresponding Author

Institute of Stem Cell Research, Helmholtz Center for Health and Environmental Research Munich, Neuherberg, Germany

Department of Dermatology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany

Correspondence to: H Ganz, Institute of Stem Cell Research, Helmholtz Centre for Health and Environmental Research Munich, Ingolstädter Landstraße 1, 85764 München, Germany. E-mail: hilary.ganz@tum.de or C Scheel, Department of Dermatology, Ruhr-University Bochum, Gudrunstr. 56, 44791 Bochum, Germany.

E-mail: christina.scheel@klinikum-bochum.de