1 Department of Intensive Care Unit, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
2 Emergency Department, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
3 Department of Thoracic and Cardiovascular Surgical, Zhujiang Hospital, Southern Medical University, Guangzhou, China.
4 Department of Pulmonary, Critical Care, and Sleep Medicine, Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States.