Efficacy and Safety of a Combination of Shenmai Injection plus Chemotherapy for the Treatment of Lung Cancer: A Meta-Analysis

Figure 2

Bias risk analysis of included studies. (a) Methodological quality assessment of all included studies. (b) Methodological quality summary of each included study. +: L (low risk of bias); ?: U (unclear risk of bias); −: H (high risk of bias).

(a)

(b)