Received: 9 May 2017
Accepted: 10 December 2017
First Online: 15 January 2018
Ethics approval and consent to participate
: The two patients signed written informed consent to participate in the clinical study. The study protocol was approved by the ethical board of the Friedrich Alexander University Erlangen-Nürnberg. The consent forms are held by the authors’ institution and available for review by the Editor-in-Chief.
: We had all necessary consent from both patients involved in the study.
: The authors declare that they have no competing interests.
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