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Shafrir, Amy L., Helena Schock, Elizabeth M. Poole, Kathryn L. Terry, Rulla M. Tamimi, Susan E. Hankinson, Bernard A. Rosner, and Shelley S. Tworoger. "A Prospective Cohort Study of Oral Contraceptive Use and Ovarian Cancer Among Women in the United States Born From 1947 to 1964." Cancer Causes Control 2017.

Shafrir, Amy L., et al. "A Prospective Cohort Study of Oral Contraceptive Use and Ovarian Cancer Among Women in the United States Born From 1947 to 1964." Cancer Causes Control 2017.