Interestingly, IL‐4R and IL‐10R immunopositivity was higher compared with IL‐4 immunopositivity in both NP/AF and CEP regions, similar to previously reported IL‐1 and IL‐1R expression patterns on human non‐degenerated and degenerated NP and inner AF samples [34]. The gene discussed is IL4; the disease is atrial fibrillation.