1 German Aerospace Center (DLR), Institute of Aerospace Medicine, Linder Hoehe, 51147, Cologne, Germany. Ulrich.limper@dlr.de.
2 Department of Anesthesiology and Intensive Care Medicine, Merheim Medical Center (CMMC), Witten/Herdecke University, Witten, Germany. Ulrich.limper@dlr.de.
3 German Aerospace Center (DLR), Institute of Aerospace Medicine, Linder Hoehe, 51147, Cologne, Germany.
4 Departments of Medicine and Radiology, University of California, San Diego, CA, USA.
5 Department of Internal Medicine III, University of Cologne, Cologne, Germany.
6 Department of Radiology, Cologne-Merheim Medical Center (CMMC), Witten/Herdecke University, Witten, Germany.
7 Department of Cardiology, Université de Libre de Bruxelles, Brussels, Belgium.
8 European Space Agency, European Astronaut Centre, Cologne, Germany.
9 Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.
10 Chair of Aerospace Medicine, University of Cologne, Cologne, Germany.