1. Department of Pulmonary and Critical Care Medicine, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, China
2. Department of Critical Care Medicine, Anhua People’s Hospital, Yiyang, Hunan, China
3. Department of Tuberculosis Intensive Care Unit, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, China