title: Observations of sequential changes in bone mass in postmenopausal women: a controlled trial of oestrogen and calcium therapy.
mesh_terms: D001862:Bone Resorption; D001842:Bone and Bones / Q000503:physiopathology*; D002118:Calcium / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004997:Ethinyl Estradiol / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008593:Menopause; D008875:Middle Aged
chemical_list: D004997:Ethinyl Estradiol; D002118:Calcium