Funding for this research was provided by:
Text and Data Mining valid from 2018-04-10
Received: 11 April 2016
Accepted: 28 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: Not applicable. Only de-identified health insurance data were used in this study. The statutory health insurance AOK Nordost supplied completely de-identified data and gave us permission to analyze the data in this project and to publish the results in aggregated form.
: Not applicable
: The authors declare that they have no competing interests.
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