[Hormone replacement therapy--effective in preventing osteoporosis?].
D000368:Aged; D002986:Clinical Trials as Topic; D005260:Female; D020249:Hormone Replacement Therapy / Q000009:adverse effects / Q000451:nursing*; D006801:Humans; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000451:nursing* / Q000517:prevention & control; D018570:Risk Assessment; D012307:Risk Factors