Funding for this research was provided by:
National Heart, Lung, and Blood Institute (HL127203, HL078871, HL092961, HL141195, HL105489)
National Institute on Aging (AG046210)
U.S. Department of Veterans Affairs (I01BX003056)
Text and Data Mining valid from 2018-05-10
Received: 8 March 2018
Accepted: 1 May 2018
First Online: 10 May 2018
Ethics approval and consent to participate
: 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.