1. Pulmonary and Critical Care Medicine, Yantai Yuhuangding Hospital,Yantai,Shandong, China
2. Disinfection Supply Center,Yantai Yuhuangding Hospital, Yantai, Shandong, China
3. Operating Room,Yantai Yuhuangding Hospital, Yantai, Shandong, China
4. Department of Emergency,Jinan Children’s Hospital, Jinan, Shandong, China