[1] Hennepin Cty Med Ctr, Dept Emergency Med, Minneapolis, MN USA
[2] Minnesota Poison Control Syst, Minneapolis, MN 55415 USA
[3] Univ Minnesota, Dept Emergency Med, Minneapolis, MN USA
[4] Cincinnati Childrens Hosp Med Ctr, Dept Hematol Oncol, Cincinnati, OH 45229 USA