Author(s) affiliations:Wei Cheng1, Jin-Feng Wang2, Cong-Xian Yang3, Liang Wu4, Qin Yin4, He Liu3, Zhi-Jian Fu3
1 Department of Pain Management, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, Jinan, Shandong 250000; Department of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Jiangsu Province Key Laboratory of Anesthesiology and Center for Pain Research and Treatment, Jiangsu 221002, PR China
2 Department of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Jiangsu Province Key Laboratory of Anesthesiology and Center for Pain Research and Treatment; Department of Anesthesiology, Xuzhou Central Hospital, Jiangsu 221002, PR China
3 Department of Pain Management, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, Jinan, Shandong 250000, PR China
4 Department of Anesthesiology, Affiliated Hospital of Xuzhou Medical College, Jiangsu Province Key Laboratory of Anesthesiology and Center for Pain Research and Treatment, Jiangsu 221002, PR China