1 From the Institute for Aerospace Medicine, German Aerospace Center, Cologne, Germany (J.J., R.M.).
2 Chair for Aerospace Medicine (J.J.), University of Cologne, Germany.
3 University Hypertension Center (J.J.), University of Cologne, Germany.
4 Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, OH (S.C., M.V.-K., B.J.).