Funding for this research was provided by:
Top Institute Food and Nutrition (n.a.)
Received: 4 February 2019
Accepted: 10 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: The study was approved by the Medical Ethics Committee of Wageningen University. All participants gave their written informed consent.
: Not applicable.
: LdG declares to have filed a patent related to vitamin D and cognitive executive function. All other authors have nothing to declare.
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