Scores based on neutrophil percentage and lactate dehydrogenase with or without oxygen saturation predict hospital mortality risk in severe COVID-19 patients oleh Xiude Fan, Bin Zhu, Masoud Nouri-Vaskeh, Chunguo Jiang, Xiaokai Feng, Kyle Poulsen, Behzad Baradaran, Jiansong Fang, Erfan Ahmadi Ade, Akbar Sharifi, Zhigang Zhao, Qunying Han, Yong Zhang, Liming Zhang, Zhengwen Liu