Received: 9 October 2017
Accepted: 25 January 2018
First Online: 7 February 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the institutional review board of the Universitatsklinikum Erlangen. Patients provided written informed consent.
: Not applicable.
: HB is employed by ORGENTEC Diagnostika GmbH. The other authors declare that they have no competing interests.
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