A Study to Evaluate the Efficacy and Safety of Iguratimod Compared to Placebo in Patients With Active Primary Sjogren's Syndrome.

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Peking University People's Hospital, Beijing

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Jilin Province People's Hospital, Changchun

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Shandong Provincial Hospital Affliated to Shandong First Medical University, Jinan

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The Second Affiliated Hospital of Jiaxing University, Jiaxing

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Ningbo First Hospital, Ningbo

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The Second Xiangya Hospital of Central South University, Changsha

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Southern Medical University Nanfang Hospital, Guangzhou

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Sun Yat-sen Memorial Hospital, Guangzhou

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The First Affiliated Hospital of Xiamen University, Xiamen

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the Second Affiliated Hospital of Guangxi Medical University, Nanning

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Hebei General Hospital, Shijiazhuang

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the Second Hospital of HeBei Medical University, Shijiazhuang

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the First Affiliated Hospital of Henan University of Science and Technology, Luoyang

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Xinxiang Central Hospital, Xinxiang

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The First Affiliated Hospital of Zhengzhou University, Zhengzhou

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Jiangsu Province Hospital, Nanjing

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Nanjing Drum Tower Hospital, Nanjing

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the First Hospital of Jilin University, Changchun

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Qilu Hospital of Shandong University, Jinan

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the Shanghai Ninth People's Hospital, Shanghai

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Tongji Hospital of Tongji University, Shanghai

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Heping Hospital Affiliated to Changzhi Medical College, Changzhi

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Shanxi Bethune hospital, Taiyuan

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the Second Hospital of Shanxi Medical University, Taiyuan

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the Second Affiliated Hospital of Xi'an Jiaotong University, Xi’an

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Tianjin First Central Hospital, Tianjin

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Zhejiang Provincial People's Hospital, Hangzhou

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the First People's Hospital of Wenling, Wenling

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The First Affiliated Hospital of Wenzhou Medical University, Wenzhou

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The Affiliated Hospitalof Inner Mongolia Medical University, Hohhot