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Authors
Achenbach, Leonard https://orcid.org/0000-0002-9053-0624
Loose, Oliver
Laver, Lior
Zeman, Florian
Nerlich, Michael
Angele, Peter
Krutsch, Werner
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Article History
Received: 1 December 2017
Accepted: 20 March 2018
First Online: 28 March 2018
Compliance with ethical standards
:
: The authors have no conflicts of interest.
: Institutional Review Board (IRB) approval was obtained from the IRB (ID 17-750104-101) prior to initiation of this study.
: Informed written consent was obtained from all study participants and from the parents of the u-17 players.
