1. From Department of Physiology and Pain Research Center (D.L., Z.-Z.H., Y.-Z.L., J.-Y.W., Y.C., H.-Q.Z., W.-J.X.), Zhongshan Medical School, and Department of Hematology (X.-Z.Z.), the Third Affiliated Hospital, Sun Yet-Sen University, Guangzhou, Guangdong, People’s Republic of China.