Effectiveness of interventions to influence parent knowledge related to consulting for respiratory tract infections in children.

*cluster randomised controlled trial; **pre/post design: intervention = post; control = pre; ***non-randomised controlled trial; ¶using Fisher's Exact Test; ED: emergency department; GP: general practitioner; mo: month; Min: minimum; NNT: number needed to treat; OR: odds ratio; yr: years. Italicized p-values were those reported in original study.