An Elevated Platelet-to-Lymphocyte Ratio Predicts Poor Prognosis and Clinicopathological Characteristics in Patients with Colorectal Cancer: A Meta-Analysis

Figure 4

Funnel plots assessing publication bias for overall survival (a), disease-free survival (b), cancer-specific survival (c), and recurrence-free survival (d).

(a)

(b)

(c)

(d)