Received: 20 December 2019
Accepted: 18 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki and with approval from the Ethics Committee of the Ludwig-Maximilians-University Munich (Reference Number 17–630). Written informed consent was obtained from all patients prior to study enrolment.
: Written informed consent for image publication was obtained from the patient depicted in the figures.
: The authors declare that they have no competing interests.