Received: 31 August 2018
Accepted: 4 January 2019
First Online: 30 January 2019
Ethics approval and consent to participate
: Institutional Review Board approval was obtained from the Ethikkommission der Medizinischen Fakultät, Universität Ulm, Germany. Written informed consent was obtained from all patients and/or their legal guardians for all diagnostic procedures reported in this study.
: As part of the hospital treatment contract, informed written consent is obtained from all patients and/or their legal guardians for the use of their anonymised data for research purposes. No personal data is included in this manuscript.
: The authors declare that they have no competing interests.
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