Cao D, Wang Y, Wang LQ, Sun XL, Huang F, Meng Y, Ren LL, Zhang XW. [Expression of plasma Dickkopf-1 in patients with rheumatoid arthritis and its correlation with peripheral blood T cell subsets]. Beijing Da Xue Xue Bao Yi Xue Ban. 2020 Sep 30;53(2):255–60. PMID: 33879894; PMCID: PMC8072444.