title: Letter: Osteoporosis of ageing.
mesh_terms: D000368:Aged; D000375:Aging; D006801:Humans; D006887:Hydroxycholecalciferols / Q000627:therapeutic use; D008875:Middle Aged; D010024:Osteoporosis / Q000188:drug therapy
chemical_list: D006887:Hydroxycholecalciferols