1. Department of DermatologyUniversity Hospital Basel Basel Switzerland
2. Department of Dermatology & AllergyUniversity Hospital of Basel Basel Switzerland
3. Department of DermatologyUniversity of Rome Guglielmo Marconi Rome Italy
4. Department of DermatologyUniversity Medical Center Mainz Mainz Germany
5. Dermatology Centre, The Manchester Academic Health Science CentreThe University of Manchester Manchester UK