1. Center of Space Medicine Berlin, Neuromuscular GroupInstitute of Anatomy Berlin Germany
2. Dipartimento di Scienze Biomediche SperimentaliUniversita' di Padova Padua Italy
3. Center for Muscle and Bone Research (ZMK)Campus Benjamin Franklin, Charité Universitätsmedizin Berlin Berlin Germany
4. Consiglio Nazionale delle Ricerche Institute of Neuroscience Padua Italy