Received: 30 October 2019
Accepted: 12 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: The study was conducted in accordance to §12 of the Hamburg Hospital Law (HmbKHG) from 17.04.1991, therefore no ethics committee approval was needed.
: Patient’s written informed consent to publish potentially identifying images and clinical details was obtained.
: The authors declare that they have no competing interests.