Medical problems in senile osteoporosis.
D000368:Aged; D001842:Bone and Bones / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism*; D002127:Calcium Isotopes; D002136:Calcium, Dietary; D006728:Hormones; D006801:Humans; D010024:Osteoporosis / Q000209:etiology* / Q000378:metabolism*
D002127:Calcium Isotopes; D002136:Calcium, Dietary; D006728:Hormones; D002118:Calcium