Received: 16 March 2017
Accepted: 15 November 2017
First Online: 19 January 2018
Ethics approval and consent to participate
: The re-analysis performed in our research did not require additional ethical approval as it did not deviate from the original study published elsewhere [CitationRef removed]. Anonymised data were provided by the data center of this original report.
: Not applicable.
: The authors declare that they have no competing interests.
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