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The cohort/case-control subgroup analysis: (A): Forest plot of the included Cohort studies that examined the association between metformin application and fracture risk in type 2 diabetic patients; (B): Forest plot of the included Case-control studies that examined the association between metformin application and fracture risk in type 2 diabetic patients. (Study: author and year of publication; es, effect size; 95% CI, 95% confidence interval; Weight, weight).
