Received: 20 November 2019
Accepted: 16 July 2020
First Online: 18 August 2020
Ethics approval and consent to participate
: Ethical approval was obtained in the Department of Dermatology of the University Hospital of Erlangen following approval by the institutional review board. The patients provided written informed consent.
: <i>Not applicable.</i>
: The authors declare that they have no competing interests.