1. Department of DermatologyBoston University School of MedicineBostonMassachusetts02118USA
2. Department of DermatologyUniversity Hospital EppendorfUniversity of HamburgHamburgGermany
3. Department of Clinical Chemistry and PathobiochemistryUniversity Hospital Benjamin FranklinFree UniversityBerlinGermany
4. Department of Anatomy and Cell BiologyUniversity of GoteborgGoteborgSweden
5. Deutsches RheumaforschungzentrumBerlinGermany