1 Department of Dermatology and Venereology, Medical University of Graz, Graz, Austria.
2 Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria.
3 Centre for Health Economics Research and Modelling Infectious Diseases (CHERMID), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium.