Routine extensive cardiovascular screening before oral beta-blocker therapy for infantile hemangiomas: A systematic review and meta-analysis of real-world evidence

Supplementary materials for this systematic review and meta-analysis include: Supplementary materials for this systematic review and meta-analysis include:
① Supplementary 1 PRISMA checklists
② 5 supplementary tables covering summary of guidelines, search strategies, study inclusion/exclusion, main characteristics of studies and quality assessment
③ Supplementary Figure 1. Forest plots showing the pooled proportions of abnormal electrocardiograms and abnormal echocardiograms

本系统综述与荟萃分析的补充材料包括：① 补充材料1：PRISMA检查表（PRISMA）；② 5份补充表格，涵盖指南汇总、检索策略、研究纳入/排除标准、研究主要特征及质量评价；③ 补充图1：森林图，展示异常心电图与异常超声心动图的合并比例。