CCL21 and Hashimoto thyroiditis: Compared with the healthy control group, the Hashimoto’s thyroiditis group had significantly increased serum CCL21 [154.92 (147.01, 165.34) vs 123.74 (118.02,129.22), p<0.001] and CCR7 [19.15 (18.19, 19.71) vs 16.47 (15.88, 17.14), p<0.001], decreased free triiodothyronine, and increased thyroid stimulating hormone, TgAb, and TPOAb.