Funding for this research was provided by:
National Institute on Aging (AG045957, AG051858, AG027161, AG021155, AG033514, F31AG062009)
Institute for Clinical and Translational Research, University of Wisconsin, Madison (UL1RR025011)
First Online: 9 March 2019
Compliance with ethical standards
: Ryan J. Dougherty, Elizabeth A. Boots, Jacob B. Lindheimer, Aaron J. Stegner, Stephanie Van Riper, Dorothy F. Edwards, Catherine L. Gallagher, Cynthia M. Carlsson, Howard A. Rowley, Barbara B. Bendlin, Sanjay Asthana, Bruce P. Hermann, Mark A. Sager, Sterling C. Johnson, Ozioma C. Okonkwo, and Dane B. Cook declare no conflicts of interest.
: All procedures followed were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.