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Authors
de Graaf-Ruizendaal, W. A.
van der Hoek, L.
de Bakker, D. H.
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Funding
Funding for this research was provided by:
Ministerie van Volksgezondheid, Welzijn en Sport
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Article History
Received: 5 September 2016
Accepted: 6 April 2018
First Online: 25 April 2018
Ethics approval and consent to participate
: The data from the NIVEL Primary Care Database, NIVEL database of health professionals and Statistics Netherlands was completely anonymised before it was released for this study. NIVEL and Statistics Netherlands have both full ISO-9001 accreditation and NIVEL works according to the high standards of scientific research from The Netherlands Board on Research Integrity. According to Dutch legislation, approval by a medical ethics committee was not required for these observational studies. Permissions were required to access and use the NIVEL databases and the census data. Permission were obtained from NIVEL and Statistics Netherlands. For both organizations the authors signed a secrecy statement.
: The authors declare that they have no competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
