Specific HLA-DQB1 alleles associated with risk for development of hepatocellular carcinoma: A meta-analysis

Figure 6 The funnel plot to detect publication bias of each study for DQB1*02, DQB1*03, DQB1*0502 and DQB1*0602. Each point represents a separate study for the indicated association. A: Funnel plot analysis of human leukocyte antigen (HLA)-DQB1*02 allele and hepatocellular carcinoma (HCC) to detect publication bias ; B: Funnel plot analysis of HLA-DQB1*03 allele and HCC to detect publication bias; C: Funnel plot analysis of HLA-DQB1*0502 allele and HCC to detect publication bias; D: Funnel plot analysis of HLA-DQB1*0602 allele and HCC to detect publication bias.