1 Department of Ultrasound, Air Force General Hospital of PLA, Beijing, China
8 Daping Hospital,Third Military Medical University, Chongqing, China
3 Department of General Surgery, the Second People's Hospital of Guangdong Province, Guangzhou, China
4 Department of Cardiology, the First Affiliated Hospital of Chinese PLA General Hospital, Beijing, China
5 Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xian, China
6 International Mongolian Hospital, Hohhot of Inner Mongolia, Hohhot, China
7 Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, Beijing, China
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