[1] Nationwide Childrens Hosp, Abigail Wexner Res Inst, Ctr Biobehav Hlth, 700 Childrens Dr, Columbus, OH 43205 USA
[2] Dalhousie Univ, Halifax, NS, Canada
[3] Hosp Sick Children, Toronto, ON, Canada
[4] Univ Toronto, Toronto, ON, Canada
[5] Vanderbilt Univ, Sch Nursing, Nashville, TN 37240 USA
[6] Colorado Sch Publ Hlth, Aurora, CO USA
[7] Vanderbilt Univ, Dept Psychol & Human Dev, Nashville, TN 37235 USA
[8] Univ Victoria, Victoria, BC, Canada
[9] Loyola Univ, Chicago, IL 60611 USA
[10] Ohio State Univ, Dept Pediat, Columbus, OH 43210 USA