On osteoporosis.
D001416:Back Pain / Q000188:drug therapy; D002118:Calcium / Q000378:metabolism; D004967:Estrogens / Q000627:therapeutic use; D005260:Female; D006801:Humans; D010024:Osteoporosis / Q000150:complications*; D010510:Periodontal Diseases / Q000209:etiology*
D004967:Estrogens; D002118:Calcium