Funding for this research was provided by:
National Institute on Aging (AG04563, AG10175)
John D. and Catherine T. MacArthur Foundation
Forskningsrådet för Arbetsliv och Socialvetenskap (97:0147:1B, 2009-0795)
Svenska Forskningsrådet Formas (825-2007-7460, 825-2009-6141)
Article History
Received: 8 November 2019
Accepted: 22 January 2020
First Online: 13 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: All procedures have been reviewed by a physician affiliated with the study and all have been approved by the Ethics Committee at Karolinska Institutet (dnr. 84:61, dnr 98:319) and the Regional Ethics Review Board (dnr. 2010/657-31/3). All procedures were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants in the study.