1. Department of Critical Care Medicine, Yantai Yuhuangding Hospital Affiliated with Medical College of Qingdao University, Yantai, Shandong, China
2. Faculty of Health Sciences and Sports, Macao Polytechnic University, Macao SAR, China
3. School of Medicine, University of California, San Diego, California, USA
4. The Second Clinical Medical College, Binzhou Medical University, Binzhou, Shandong, China