Clinical efficacy of immunoglobulin on the treatment of severe fever with thrombocytopenia syndrome: a retrospective cohort studyResearch in context oleh Shan-Shan Zhang, Juan Du, Ning Cui, Xin Yang, Lan Zhang, Wan-Xue Zhang, Ming Yue, Yong-Xiang Wu, Tong Yang, Xiao-Ai Zhang, Zhen-Dong Yang, Hong-Di Lv, Qing-Bin Lu, Wei Liu