Fig. 1From: Global burden of the COVID-19 associated patient-related delay in emergency healthcare: a panel of systematic review and meta-analysesPrisma Flow chart of study the National Institutes of Health (NIH) Quality Assessment Tool (Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies) was used to assess the quality of included studies and ranking studies in three categories of “good”, “fair”, and “poor”. (https://www.nhlbi.nih.gov/health-topics/study-quality-assessment-tools)Back to article page