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Systematic Reviews
©The Author(s) 2021.
World J Gastrointest Surg. Jun 27, 2021; 13(6): 597-619
Published online Jun 27, 2021. doi: 10.4240/wjgs.v13.i6.597
Figure 1
Figure 1 Flow chart of clinical study design. PSM: Propensity score matching.


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