[1] Canadian Blood Serv, Donat Policy & Studies Grp, Ottawa, ON, Canada
[2] Carleton Univ, Dept Hlth Sci, Ottawa, ON, Canada
[3] Univ Toronto, Inst Hlth Policy Management & Evaluat, Toronto, ON, Canada
[4] Western Univ, Dept Psychol, London, ON, Canada
[5] Western Univ, Dept Obstet & Gynaecol, London, ON, Canada