title: Vitamin D and calcium: mixed messages.
mesh_terms: D000368:Aged; D002118:Calcium / Q000627:therapeutic use*; D050723:Fractures, Bone / Q000517:prevention & control*; D006620:Hip Fractures / Q000517:prevention & control; D006801:Humans; D014807:Vitamin D / Q000627:therapeutic use*
chemical_list: D014807:Vitamin D; D002118:Calcium