title: Human involvement in long-term spaceflight.
authors.forename: H
authors.initials: H
authors.lastname: Sandler
mesh_terms: D000223:Adaptation, Psychological; D001826:Body Fluids / Q000502:physiology; D001842:Bone and Bones / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D002940:Circadian Rhythm; D003695:Delivery of Health Care; D018504:Ecological Systems, Closed; D006321:Heart / Q000502:physiology; D006801:Humans; D013026:Space Flight; D014893:Weightlessness
chemical_list: D002118:Calcium