1. Center for Biomedical Research on Pain (CBRP), College of Medicine; Xi'an Jiaotong University; Xi'an 710061 PR China
2. Department of Anesthesia; First affiliated hospital of Xi'an Jiaotong University; Xi'an 710061 PR China
3. Department of Pain; Tongji Hospital affiliated to Shanghai Tongji University; Shanghai 200065 PR China
4. College of Life Science; Yan'an University; Yan'an 716000 PR China