1. Department of Dermatology and AllergologyAllergie‐Centrum‐Charité, Charité–Universitätsmedizin BerlinBerlinGermany
2. Department of DermatologyUniversity Hospital WürzburgWürzburgGermany
3. Department of DermatologyUniversity Hospital Hamburg‐EppendorfHamburgGermany
4. Department of DermatologyUniversity Hospital LübeckLübeckGermany
5. Department of DermatologyUniversity Hospital MainzMainzGermany