[1] Med Univ South Carolina, Dept Emergency Med, Charleston, SC 29425 USA
[2] Med Univ South Carolina, Div Gen Pediat, Dept Pediat, Charleston, SC 29425 USA
[3] Med Univ South Carolina, Div Pediat Emergency Med, Dept Pediat, 135 Rutledge Ave,MSC 917, Charleston, SC 29425 USA