Funding for this research was provided by:
Ministerie van Volksgezondheid, Welzijn en Sport (318 804)
Received: 27 November 2017
Accepted: 7 January 2019
First Online: 23 January 2019
Ethics approval and consent to participate
: The study has been approved by the Daily Board of the Medical Ethics Committee Erasmus MC of Rotterdam, the Netherlands (MEC 2012-425). Written informed consent was obtained from all participants of the cohort study.
: Not applicable.
: The authors declare that they have no competing interests.
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