Text and Data Mining valid from 2019-04-02
Received: 18 July 2017
Accepted: 26 March 2019
First Online: 2 April 2019
Ethics approval and consent to participate
: This type of observational study contains anonymized/non-identifiable data and is therefore, according to Dutch law and the rules of the Medical Research Involving Human Subjects Act (WMO), exempt from obtaining informed consent of participants and exempt from approval by the ethics committee. The databases accessed and used in our study are managed by NIVEL.
: Not applicable.
: The authors declare that they have no competing interests.
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