Received: 12 November 2018
Accepted: 13 March 2019
First Online: 1 April 2019
Change Date: 18 June 2019
Change Type: Correction
Change Details: Following publication of the original article , the authors reported that the information regarding ethics approval was accidentally entered under trial registration. A trial registration was not required for this study.
Ethics approval and consent to participate
: The study is in accordance with the ethical standards of the institutional and/or national ethics committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the ethics committee of Witten/Herdecke University (Witten, Germany, approval number 12/2016).
: Informed consent for the anonymized usage of patient data and records was obtained from all study participants.
: The authors report no financial or other conflict of interest relevant to this article, which is the intellectual property of the authors.
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