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    • Thomas, David B.; Molina, Ramiro; Cuevas, Hector Rodriguez; Ray, Roberta M.; Riotton, Gustave; Dabancens, Alfredo; Benavides, Socorro; Martinez, Luis; Salas, Oriana; Pallet, Jose A.; Lopez, Jorge (Oxford University Press, 1989)
      The World Health Organization Collaborative Study of Neoplasia and Steroid Contraceptives is a large multinational hospital-based case-control study of steroid contraceptives and gynecologic, hepatobiliary, and mammary ...