Compositional factors affecting vertebral x-ray absorption.
D015502:Absorptiometry, Photon; D001842:Bone and Bones / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D006801:Humans; D008903:Minerals / Q000378:metabolism; D010024:Osteoporosis / Q000000981:diagnostic imaging*; D013131:Spine / Q000000981:diagnostic imaging*; D014867:Water
D008903:Minerals; D014867:Water; D002118:Calcium