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2. Report from the public board of inquiry on Depo-Provera;Weiss,1984
3. WHO Collaborative Study of Neoplasia and Steroid Contraceptives. Breast cancer, cervical cancer, and depot-medroxyprogesterone acetate;Lancet,1984
4. WHO Collaborative Study of Neoplasia and Steroid Contraceptives. Breast cancer and depot-medroxyprogesterone acetate;Bull WHO,1985