[1] Univ Michigan, Sch Social Work, 1080 South Univ Ave, Ann Arbor, MI 48109 USA
[2] Univ Wisconsin, Sandra Rosenbaum Sch Social Work, Madison, WI USA
[3] Northwestern Univ, Feinberg Sch Med, Dept Pediat, Chicago, IL 60611 USA
[4] Rush Med Coll, Chicago, IL 60612 USA
[5] Univ Michigan, Injury Prevent Ctr, Dept Emergency, Ann Arbor, MI 48109 USA
[6] Univ Michigan, Injury Prevent Ctr, Dept Family, Ann Arbor, MI 48109 USA
[7] Univ Michigan, Injury Prevent Ctr, Dept Internal Med, Ann Arbor, MI 48109 USA