1. Department of DermatologyVenereologyand AllergologyUniversity Medical Center Göttingen Germany
2. Department of DermatologyUniversity of Cologne Cologne Germany
3. Department of DermatologyInselspitalBern University HospitalUniversity of Bern Switzerland
4. Institute for Medical MicrobiologyUniversity Medical Center Göttingen Germany
5. Lower Saxony Institute of Occupational DermatologyUniversity Medical Center Göttingen Germany