Affiliations

• ¹ Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany (P.F.-M., D.L.R., J.J., J.T.).
• ² Laboratory of Autonomic Regulation of the Cardiovascular System, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia (E.L.).
• ³ Chair of Aerospace Medicine, University of Cologne, Germany (J.J.).
• ⁴ Institute of Clinical Chemistry, Hannover Medical School, Germany (R.L.).
• ⁵ SK3/Biomedical Research and Environmental Sciences Division, Human Health and Performance Directorate, National Aeronautics and Space Administration Johnson Space Center, Houston, TX (S.M.S.).
• ⁶ Department of Nutrition and Food Science, University of Bonn, Germany (M.H.).