High circulating level of interleukin-18 in patients with primary Sjögren's syndrome is associated with disease activity. Issue 1 (2nd January 2016) - Chen, Yan; Deng, Fengyuan; Zheng, Junfeng; Yin, Junping; Huang, Renliang; Liu, Wen; Lin, Qingyan; Gao, Yushang; Gao, Xing; Yu, Xinhua; Liu, Zuguo; Chen, Juan