1. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
2. Department of Dermatology and Allergy Centre, Odense University Hospital, Odense, Denmark
3. Open Patient data Exploratory Network (OPEN), Odense University Hospital , Odense , Denmark
4. Department of Dermatology, Wake Forest University School of Medicine , Winston-Salem, NC , USA
5. Danish Centre for Health Economics (DaCHE), University of Southern Denmark , Odense , Denmark