Clinical characteristics and prognosis of serous body cavity effusions in patients with sepsis: a retrospective observational study oleh Ling-Yu Xing, Jun Yin, Mian Shao, Yi-Lin Yang, Ke-Yong Li, Ming-Ming Xue, Su-Cheng Mu, Zhan Sun, Ya-Ping Zhang, Chen-Ling Yao, Xun Chu, Chao-Yang Tong, Zhen-Ju Song