Funding for this research was provided by:
National Institutes of Health (2P01AG031719)
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (452-13-001)
Received: 23 August 2019
Accepted: 31 December 2019
First Online: 10 January 2020
Ethics approval and consent to participate
: All data are publicly available on an aggregate basis. Consequently, no ethics approval was necessary.
: Not applicable.
: The authors declare that they have no competing interests.