Funding for this research was provided by:
Forskningsrådet för Hälsa, Arbetsliv och Välfärd (2013-2506)
Fifth Framework Programme (QLK6-CT-2001-00360)
Sixth Framework Programme (RII-CT-2006-062193, CIT5-CT-2005-028857, CIT4-CT-2006-028812)
Seventh Framework Programme (N°211909, N°227822, N°261982)
German Ministry of Education and Research
National Institute on Aging (U01_AG09740-13S2, P01_AG005842, P01_AG08291, P30_AG12815, R21_AG025169, Y1-AG-4553-01, IAG_BSR06-11, OGHA_04-064)
Article History
First Online: 2 December 2017
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: It was obtained from all individual participants included in the study.