{Reference Type}: Letter {Title}: Letter to the editor: "Definition of follicular helper T cell and cytokines expression in synovial fluid of rheumatoid arthritis". {Author}: Chen G;Chen H;Wang Z;Cai H; {Journal}: Clin Rheumatol {Volume}: 43 {Issue}: 7 {Year}: 2024 Jul 18 {Factor}: 3.65 {DOI}: 10.1007/s10067-024-07006-2