1. Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, the Fourth Military Medical University. 127th West Changle Road, Xi’an, 710032, Shaanxi, P.R. China
2. General Hospital of Chengdu Military Region of Chinese PLA, the 270th Tianhui Road, Chengdu, 610083, Sichuan, P.R. China