Text and Data Mining valid from 2019-06-26
Received: 5 February 2019
Accepted: 6 May 2019
First Online: 26 June 2019
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board (IRB00001473; file reference: EK507122017). The study was performed in accordance with the Declaration of Helsinki. All participants provided their written consent prior to the start of the study.
: Not applicable.
: Matthias C. Schulz, Francisca Hofmann, Ursula Range, Günter Lauer, and Dominik Haim declare that they have no competing interests.
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