Osteoporosis.
D000328:Adult; D000368:Aged; D002118:Calcium / Q000627:therapeutic use; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008875:Middle Aged; D010024:Osteoporosis / Q000188:drug therapy / Q000209:etiology / Q000517:prevention & control; D012306:Risk
D004967:Estrogens; D002118:Calcium