Funding for this research was provided by:
National Institutes of Health (NIH/NINR 5R01NR009270, 1ZIANR000035-01, 1ZIANR000030)
Received: 22 August 2019
Accepted: 27 February 2020
First Online: 10 March 2020
Ethics approval and consent to participate
: The parent study was approved by the Institutional Review Board of the University of Tennessee Health Science Center. The additional analyses on the repository samples was approved by the Office of Human Subjects Research and the Institutional Review Board of the National Institutes of Health. Written informed consent was obtained from all participants, and some patients also signed an optional repository consent.
: Not applicable.
: Potential competing interests: The authors have no potential conflicts of interest to disclose.