1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China.
2 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China; Department of Interventional Radiology and Pain Management, The 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, 730050, China.
3 Department of Interventional Radiology and Pain Management, The 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, 730050, China. Electronic address: wyft2006@sina.com.