title: Osteoporosis and calcium balance.
mesh_terms: D000368:Aged; D002117:Calcitriol / Q000627:therapeutic use; D002118:Calcium / Q000378:metabolism*; D005260:Female; D006801:Humans; D010024:Osteoporosis / Q000209:etiology* / Q000378:metabolism; D010281:Parathyroid Hormone / Q000097:blood
chemical_list: D010281:Parathyroid Hormone; D002117:Calcitriol; D002118:Calcium