Funding for this research was provided by:
Robert Bosch Stiftung
Received: 19 December 2018
Accepted: 20 May 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: The ethics committee of the University of Tübingen approved the study and all patients gave written informed consent.
: All patients gave written informed consent for publication of their individual details and accompanying images in this manuscript. The consent form is held by the authors’ institution in the patients’ clinical notes, and is available for review by the Editor-in-Chief.
: The authors declare that they have no competing interests.