RT Journal Article SR Electronic T1 The space-flight environment: the International Space Station and beyond JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1216 OP 1220 DO 10.1503/cmaj.081125 VO 180 IS 12 A1 Thirsk, Robert A1 Kuipers, Andre A1 Mukai, Chiaki A1 Williams, David YR 2009 UL http://www.cmaj.ca/content/180/12/1216.abstract