1. Division of Space Life Sciences; Universities Space Research Association (USRA) & Biomedical Research & Environmental Sciences Division; NASA, Johnson Space Center; Houston TX USA
2. Department of Biomedical Sciences; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
3. Department of Clinical Physiology & Nuclear Medicine; Bispebjerg University Hospital; Copenhagen Denmark
4. Department of Clinical Physiology & Nuclear Medicine; Koege Hospital; Koege Denmark
5. Department of Internal Medicine and Endocrinology; Herlev University Hospital; Herlev Denmark