TNFSF14 and rheumatoid arthritis: Considering that Antibodies against LIGHT from different providers (Our antibodies against LIGHT were provided by eBioscience, San Diego, California, USA, which was different from Kang et al. and Morel et al.)and activation of T cells both could lead to the high frequency of LIGHT+ T cells, and that T cells of RA patients and healthy controls in the present study were both activated, we thought our result could indicate a difference in expression of LIGHT in T cells between RA patients and healthy controls.