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机译:伦理、有效性和人口健康信息干预:加拿大分析
British Columbia Childrens Hosp, Res Inst, 950 W 28th Ave, Vancouver, BC V5Z 4H4, Canada;
British Columbia Ctr Subst Use, 625 Powell St, Vancouver, BC V6A 1H2, Canada;
Univ British Columbia, Sch Populat & Publ Hlth, 2206 West Mall, Vancouver, BC V6T 1Z3, Canada;
communication; surveillance; public health; ethics; young mothers;