Van den Bruel et al performed a classification and regression tree (CART) analysis of pediatric patients presenting acutely in primary practice. This can help to identify subsets of patients who are more likely to have a serious medical condition. The authors are from Katholieke Universiteit (Leuven, Belgium), Universiteit Hasselt (Diepenbeek, Belgium) and Universiteit Maastricht (Maastricht, the Netherlands).

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