Electroacupuncture reduces chronic itch via cannabinoid CB1 receptors in the ventrolateral periaqueductal gray oleh Wen-Qiang Ge, Ou-Yang Zhan-Mu, Chao Chen, Hong Zhang, Xiao-Yu Wang, Xin Liu, Li Li, Yu-Ye Lan, Chen-Nan Li, Jia-Can Sun, Run-Lin Shi, Zi-Yue Dou, Hui-Lin Pan, Hong-Ping Li, Xiang-Hong Jing, Man Li