Text and Data Mining valid from 2019-07-15
Received: 6 July 2018
Accepted: 4 July 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: The present study was reviewed and approved by the Ethical Committee of Hannover Medical School (No. 7967_BO_K_2018). A written informed consent was obtained from all subjects included in the study.
: Patients contributing to the realization of the manuscript with clinical photographs gave their written consent for publication.
: The authors declare that they have no competing interests.