[1
]
Department of Emergency Medicine, Xijing hospital, Fourth Military Medical University,
No. 17 Changle West Road, Xi'an 710032, PR China.
[2
]
Department of Anaesthiology, Wuhan general Hospital of Guangzhou Command, No. 627
Wuluo Road, Wuhan, 430070, PR China.
[3
]
Department of Emergency Medicine, Xijing hospital, Fourth Military Medical University,
No. 17 Changle West Road, Xi'an 710032, PR China. Electronic address: xijingyinwen@126.com.