Funding for this research was provided by:
National Aeronautics and Space Administration (SMO-015, NNJ10ZSA003N)
Received: 20 January 2017
Accepted: 8 August 2017
First Online: 8 September 2017
Ethics approval and consent to participate
: Study procedures were reviewed and approved by the NASA Johnson Space Center’s Institutional Review Board. Written informed consent was obtained from all subjects prior to participation. Ethics approval for all subjects participating in the stability study was obtained under a protocol specific for assay development and validation, which was approved by the NASA Johnson Space Center’s Institutional Review Board.
: The astronaut photographed in Fig. InternalRef removed reviewed the image and provided written consent to publish.
: The authors declare that they have no competing interests.
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