1. Department of Critical Care Medicine, Emergency General Hospital , Beijing , 100028 , PR China
2. Department of Vascular Surgery, Chuiyangliu Hospital Affiliated to Tsinghua University , Beijing , 100022 , PR China
3. Department of Emergency, Emergency General Hospital , Beijing , 100028 , PR China
4. Department of Emergency, Emergency General Hospital , XiBaHe South Road 29, Chaoyang District , Beijing , 100028 , PR China
5. Department of Cardiology, Ordos Central Hospital, Ordos School of Clinical Medicine, Inner Mongolia Medical University , 23 Yijinhuoluo West Street, Dongsheng District , Inner Mongolia , 017000 , PR China