Figure 6

Funnel plot analysis of genotype and allele frequency data for HLA-DQB1*05, DRB1*13 and HLA-DRB1*14 in all IgG4 patients. A funnel plot analysis was undertaken to assess publication bias. Odds ratios were plotted against the standard error and the studies demonstrated symmetrical scattering along the funnel axis (pooled effect estimate from meta-analysis).