Epidemiological Study of Sepsis in China: Protocol of a Cross-sectional Survey oleh Yi Yang, Jian-Feng Xie, Kai-Jiang Yu, Chen Yao, Jian-Guo Li, Xiang-Dong Guan, Jing Yan, Xiao-Chun Ma, Yan Kang, Cong-Shan Yang, Xiao-Qing Yao, Hong-Cai Shang, Hai-Bo Qiu, for CHESS Study Investigators