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2. Epidemiology and the menopause: a global overview;Barrett-Connor;Int J Fertil Menopausal Stud,1993
3. The menopausal transition: Analysis of LH, FSH, estradiol and progesterone concentrations during menstrual cycles of older women;Sherman;J Clin Endocrinol Metab,1976
4. Hypothalamic pituitary-ovarian function in perimenopausal women;van Look;J Clin Endocrinol Metab,1977
5. The Menopause;Asch,1977