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Schildkraut JM, Calingaert B, Marchbanks PA, Moorman PG, Rodriguez GC. Impact of progestin and estrogen potency in oral contraceptives on ovarian cancer risk. J Natl Cancer Inst. 2002 Jan 02;94(1):32–8. doi: 10.1093/jnci/94.1.32. PMID: 11773280. |