Tetrastigma hemsleyanum polysaccharide protects against "two-hit" induced severe pneumonia via TLR4/NF-κB signaling pathway

Fangmei Zhou, Ying Guo, Wenxuan Li, Yiwen Hu, Yang Liu, Siyu Fu, Xiaodan Bao, Hongbin Tong, Yujian Ye, Zhishan Ding