title: Review of roentgenographic bone demineralization studies of the Gemini space flights.
mesh_terms: D015502:Absorptiometry, Photon; D000337:Aerospace Medicine; D000535:Aluminum / Q000378:metabolism; D001842:Bone and Bones / Q000000981:diagnostic imaging* / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D006801:Humans; D008297:Male; D008903:Minerals / Q000378:metabolism*; D013026:Space Flight; D014481:United States; D014893:Weightlessness
chemical_list: D008903:Minerals; D000535:Aluminum; D002118:Calcium