[1] Bern Univ Hosp, Dept Dermatol, Inselspital, Bern, Switzerland
[2] Univ Hosp Wurzburg, Dept Dermatol, Wurzburg, Germany
[3] Univ Hosp Dusseldorf, Dept Dermatol, Dusseldorf, Germany
[4] Swiss Fed Inst Technol, Inst Mol Syst Biol, Zurich, Switzerland