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Authors
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Zurek, Marlen
Kern, Ivana
Manuwald, Ulf
Kugler, Joachim
Stange, Thoralf
Fischer, Peter
Richter, Thomas
Rothe, Ulrike
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Article History
Received: 27 July 2017
Accepted: 11 December 2017
First Online: 15 January 2018
Compliance with ethical standards
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: The study was carried out with agreement of the ethics commission of the Medical Faculty of the University of Leipzig. All procedures were performed in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: All authors have declared that they have no conflict of interest.
