1. Department of Biomedical Sciences; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
2. Department of Medicine O; Herlev University Hospital; Herlev Denmark
3. Psychiatric Research Department; Frederiksborg General Hospital; Hillerød Denmark
4. Department of Diagnostics; Clinical Physiology and Nuclear Medicine; Glostrup University Hospital; Glostrup Denmark
5. Department of Clinical Physiology and Nuclear Medicine 239; Faculty of Health Sciences; Hvidovre Hospital; Centre of Functional Imaging and Research; University of Copenhagen; Hvidovre Denmark
6. Department of Clinical Physiology and Nuclear Medicine; Bispebjerg University Hospital; Copenhagen NV Denmark
7. Division of Space Life Sciences (DSLS); Universities Space Research Association (USRA) & Biomedical Research & Environmental Sciences division; NASA; Johnson Space Center; Houston TX USA