Funding for this research was provided by:
Federal Aviation Administration (DTFAAC-11-A-00003)
National Heart, Lung, and Blood Institute (R01HL105768)
Received: 7 November 2017
Accepted: 12 April 2018
First Online: 9 May 2018
Ethics approval and consent to participate
: All individuals provided written informed consent, and Institutional Review Board approval was obtained at both Washington State University (WSU), and the Civil Aerospace Medical Institute (CAMI) of the Federal Aviation Administration.
: Not applicable; publication does not contain personally identifiable information and all subjects provided written informed consent. Analysis was performed using de-identified data.
: The authors declare that they have no competing interests.
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