Received: 26 January 2018
Accepted: 29 March 2018
First Online: 12 April 2018
Ethics approval and consent to participate
: The data collection in this non-interventional study was part of the repeated health check-up’s within the German occupational safety and health system (health check for military musicians enforced by law). As individuals participated voluntarily in the study and all data were analyzed anonymously, no ethical approval was required. This was basically stated by the Ethics Committee of the medical department (Justus-Liebig-Universität Gießen).
: The manuscript contains no individual person’s data in any form.
: The authors declare that they have no competing interests.
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