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Westhoff, Carolyn L., Andrew Eisenberger, Rosalind Tang, Serge Cremers, Lisa V. Grossman, and Malcolm C. Pike. "Clotting Factor Changes During the First Cycle of Oral Contraceptive Use." Contraception 2015.

Westhoff, Carolyn L., et al. "Clotting Factor Changes During the First Cycle of Oral Contraceptive Use." Contraception 2015.