1. Department of Clinical, Technological, and Morphological Sciences (A.B., M.Z., G.G., G.B.), Division of Internal Medicine, University of Trieste, Trieste 34149, Italy
2. Departments of Biomedical Sciences (G.M.), University of Catania, 95121 Catania, Italy
3. Department of Internal Medicine (P.C.), University of Catania, 95121 Catania, Italy
4. Deutsches Zentrum für Luft-und Raumfahrt (DLR)-Institute of Aerospace Medicine (M.H.), 51147 Cologne, Germany