title: Spaceflight, weightlessness, and bone loss--what are we measuring?
authors.forename: H H
authors.initials: HH
authors.lastname: Bolotin
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D018488:Bone Demineralization, Pathologic; D015519:Bone Density; D001847:Bone Diseases / Q000209:etiology / Q000378:metabolism; D006801:Humans; D015203:Reproducibility of Results; D013026:Space Flight; D014057:Tomography, X-Ray Computed / Q000379:methods; D014893:Weightlessness / Q000009:adverse effects*