[1] German Aerosp Ctr DLR, Inst Aerosp Med, D-51147 Cologne, Germany
[2] Witten Herdecke Univ, Dept Anesthesiol & Intens Care Med, Merheim Med Ctr CMMC, Witten, Germany
[3] Univ Calif San Diego, Dept Med, San Diego, CA 92103 USA
[4] Univ Calif San Diego, Dept Radiol, San Diego, CA 92103 USA
[5] Univ Cologne, Dept Internal Med 3, Cologne, Germany
[6] Witten Herdecke Univ, Dept Radiol, Cologne Merheim Med Ctr CMMC, Witten, Germany
[7] Univ Libre Bruxelles, Dept Cardiol, Brussels, Belgium
[8] European Space Agcy, European Astronaut Ctr, Cologne, Germany
[9] Univ Texas Southwestern Med Ctr Dallas, Dept Internal Med, Div Cardiol, Dallas, TX USA
[10] Univ Cologne, Chair Aerosp Med, Cologne, Germany