TAF9 and synovial sarcoma: The positive association between anti-TAF9 and anti-HCMVpp65422-439 antibody activities was significant in SLE, SS, gout, and RA; however, most sera from SS, gout, or RA patients had a poor response to HCMVpp65422-439 or TAF9 in the ELISA test (Fig. 1e).