Gailtal-Klinik, Hermagor, Austria
Merz Investigational Site #3590002, Sofia, Bulgaria
Merz Investigational Site #3590003, Veliko Turnovo, Bulgaria
Merz Investigational Site #3590005, Sofia, Bulgaria
proDerm, Schenefeld, Germany
Düsseldorf University Hospital, Düsseldorf, North Rhine-Westphalia, Germany