[Retracted] Relationship between Platelet-to-Lymphocyte Ratio and Lymphocyte-to-Monocyte Ratio with Spontaneous Preterm Birth: A Systematic Review and Meta-analysis

Figure 4

Begg’s funnel plot for assessing publication bias. (a) Begg’s funnel plot for assessing publication bias for PLR. (b) Begg’s funnel plot for evaluating publication bias for LMR.

(a)

(b)