Text and Data Mining valid from 2019-03-18
Received: 25 September 2018
Accepted: 1 March 2019
First Online: 18 March 2019
Compliance with ethical guidelines
: N. Nersesyan, S. Arnold and P. Krieg declare that they have no competing interests.
: All investigations described in this manuscript were carried out with the approval of the responsible ethics committee and in accordance with national law and the Helsinki Declaration of 1964 (in its current revised form). Informed consent was obtained from the patients in this case if identifiable from images or other information within the manuscript. In the case of the underage patients in this report, informed consent was obtained from the legal representatives.