Systematic Reviews
Copyright ©The Author(s) 2016.
World J Gastroenterol. May 14, 2016; 22(18): 4594-4603
Published online May 14, 2016. doi: 10.3748/wjg.v22.i18.4594
Figure 2
Figure 2 Risk-of-bias assessment for the studies included in the meta-analysis. Green (+): Low risk-of-bias; Yellow (?): Unclear risk-of-bias. ECP: European Cancer Prevention Organisation; SWOG: Southwest Oncology Group.