Puth, Marie-Therese http://orcid.org/0000-0003-1351-9381
Klaschik, Manuela
Schmid, Matthias
Weckbecker, Klaus
Münster, Eva
Article History
Received: 22 December 2017
Accepted: 25 April 2018
First Online: 14 May 2018
Ethics approval and consent to participate
: Ethics approval and participant consent was not necessary as this study involved the use of a previously-published de-identified database (secondary data analysis) according to national guidelines and recommendations in secondary data analysis [CitationRef removed] .
: The authors declare that they have no competing interests.
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