Acknowledgements
We acknowledge all medical staff involved in the diagnosis and treatment of patients with COVID-19 in Wuhan. We thank Xiuquan Lin, M.D.,from Fujian Provincial Center for Disease Control and Prevention, Fuzhou 211 Project Data Analysis Service Co., Ltd. and Yi Sun, M.D., Shuna Huang M.M., from School of Public Health, Fujian Medical University, for data collation and statistical analysis. They were not compensated for their contributions.