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1تقرير
المؤلفون: Amanda Rose Markovitz, Eirin Beate Haug, Julie Horn, Abigail Fraser, Kate M. Tilling, Eric B. Rimm, Stacey A. Missmer, Paige L. Williams, PÃ¥l Richard Romunstad, Bjørn Olav Ã…svold, Janet W
المصدر: Mathematica Policy Research, Mathematica Policy Research Reports.