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Forest plots and meta-analyses of complication rates: (A) obturator nerve reflex; (B) bladder perforation; (C) blood loss requiring transfusion. bTURB, bipolar transurethral resection of bladder tumour; mTURB, monopolar transurethral resection of bladder tumour; 95% CI, 95% confidence interval; M-H, Mantel-Haenszel method.
