Mortality prediction using clinical and laboratory features in elderly patients with severe community-acquired pneumonia - Zhu, Yaoli; Zheng, Xiaobin; Huang, Kaizhuang; Tan, Cuiyan; Li, Yaoyao; Zhu, Weiping; Liu, Ning; Zhou, Yi; Chen, Hua; Li, Peng; Cao, Qingdong; Chen, Minying (Annals of Palliative Medicine, 2021)