Johan Olof Ideström, johan.idestrom@bio.ntnu.no NTNU Samfunnsforskning AS, Trondheim, Norway Ralf Hendrik Anken, ralf.anken@dlr.de German Aerospace Center (DLR), Cologne, Germany Guenther Reitz, guenther.reitz@dlr.de German Aerospace Center (DLR), Koeln, Germany Thomas Berger, thomas.berger@dlr.de German Aerospace Center (DLR), Cologne, Germany Jens Hauslage, jens.hauslage@dlr.de DLR Inst. of Aerospace Medicine, Cologne, Germany Marianne Schuber, marianne.schuber@dlr.de German Aerospace Center (DLR), Cologne, Germany Knut R. Fossum, knut.fossum@bio.ntnu.no University of Trondheim, NTNU, Trondheim, Norway Filip Vanhavere, filip.vanhavere@sckcen.be Belgian Nuclear Research Center (SCK-CEN), Mol, Belgium