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Forest plots of odd ratios (ORs) for distant metastasis (A), local recurrence (B), bone relapse (C), lung relapse (D), brain relapse (D), liver relapse (E) and brain relapse (F). * Due to no event was reported, the study by Li was excluded in the analysis of liver relapse, and the study by Kelly was excluded in the analysis of distant metastasis and local recurrence.
