Anja Bornkessel*, Mirjana Ziemer, Siegrid Yu, Christina Hipler and Peter Elsner Department of Dermatology and Allergology, Friedrich-Schiller-University, Erfurter Str. 35, D-07743 Jena, Germany, and Department of Dermatology, University of California, San Francisco, CA, USA. *E-mail: [email protected] [The first two authors contributed equally to the writing of this paper.] Accept...