Peng Xie1, Jiaji Liu2, Liu Wu1, Daishun Liu3,4. 1. Department of Critical Care Medicine. 2. Department of Radiology, and. 3. Department of Respiratory and Critical Medicine, First People's Hospital of Zunyi (The Third Affiliated Hospital), Zunyi Medical University, Zunyi, Guizhou, People's Republic of China; and. 4. Department of Respiratory and Critical Medicine, Zunyi Medical University-Zhuhai Campus, Zhuhai, Guangdong, People's Republic of China.