1 Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
2 Institute for Cell Biology and Neurosciences, Department of Biology, Goethe University Frankfurt, Frankfurt, Germany.
3 Laboratory of Translational Research 'Stress and Immunity', Department of Anesthesiology, LMU Hospital, Ludwig-Maximilian-University, Munich, Germany.
4 Department of Anesthesiology, LMU University Hospital, Munich, Germany.
5 Advanced Concepts and Studies Office, European Space Agency, Noordwijk, the Netherlands.