1
Department of Infectious Diseases, the Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
2
Department of Respiratory and Critical Care Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
3
Tao Guo, Medical Master, Department of Emergency, the Second Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
✉Corresponding author: Jian-Hua Lei. E-mail leijianhua@csu.edu.cn. Telephone: +86-731-85292105; +86 13875859384. Fax number: +86-731-85292173
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