Department of Emergency;
Nanfang Hospital;
Southern Medical University;
Guangzhou 510515;
Guangdong Province;
China;
Department of Respiratory Diseases;
Nanfang Hospital;
Southern Medical University;
Guangzhou 510515;
Guangdong Province;
China;
Department of Digestive Disease;
Nanfang Hospital;
Southern Medical University;
Guangzhou 510515;
Guangdong Province;
China;
Department of Emergency;
the First People's Hospital of Huaihua 418000;
Hunan Province;
China;
Department of Respiratory Diseases;
Nanfang Hospital;
Southern Medical University;
Guangzhou 510515;
Guangdong Province;
China;