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First Online: 10 April 2018

Compliance with Ethical Standards

:

: The authors declare that they have no conflicts of interest.

: The research project was approved by the local ethics committee of Freie Universität Berlin as well as relevant committees of the Berlin Police (staff council, gender equality officer, severely handicapped employee representative) and is in accordance to APA ethical standards.

: All participants were informed that participation in the health monitoring survey was voluntarily and anonymously, that all data was kept externally at Freie Universität Berlin, and that all data was edited, analyzed, and represented anonymized and thus no inferences about single participants could be drawn from the data. Participants could discontinue the questionnaire before completion at any point of time.

: The Berlin Police had no further involvement with regard to study design, analysis or interpretation of the data, writing process, or submission of the article.