Funding for this research was provided by:
National Institute on Aging (P01AG04875)
National Institute of General Medical Sciences (R01GM102282)
National Center for Advancing Translational Sciences (U01TR002062)
U.S. National Library of Medicine (R01LM11934)
Received: 23 May 2018
Accepted: 10 December 2018
First Online: 7 January 2019
Ethics approval and consent to participate
: This study was a retrospective study of existing records. The study and a waiver of informed consent were approved by Mayo Clinic Institutional Review Board in accordance with 45 CFR 46.116 (Approval #17–003030).
: Not applicable; the manuscript does not contain individual level of data.
: The authors declare that they have no competing interests.
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