1. Institute of Clinical Pharmacology and Toxicology, CBF/CCM, Charité-Universitätsmedizin, Berlin, Berlin, Germany.
2. Department of Pharmacology, University of Aarhus, Aarhus C, Denmark.
3. Department of Plastic Surgery, CCM, Charité-Universitätsmedizin, Berlin, Germany.
4. Space Biology Group, ETH Zurich, Zurich, Switzerland.
5. Laboratory of Radiobiology and Microbiology, Belgian Nuclear Research Centre, SCK-CEN, Mol, Belgium.
6. Max-Planck Institute of Biochemistry, Martinsried, Germany.