Funding for this research was provided by:
Center for Healthy Aging (100-33-91001)
Received: 15 March 2018
Accepted: 5 March 2019
First Online: 14 March 2019
Ethics approval and consent to participate
: The CAMB received ethical approval from the Scientific Ethics Committee Denmark (Protocol # H-A-2008-126).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.