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2. Differences in teenage pregnancy rates among five developed countries: the roles of sexual aetivity and contraceptive use;Darroch;Fam Planning Perspect,2001
3. The 2002 Canadian contraception study: part I;Fisher;J Obstet Gynaecol Can,2004
4. Family and childbearing in Canada: a demographic analysis;Balakrishnan,1993
5. The Canadian contraception study;Boroditsky;J Soc Obstet Gynaecol Can,1995