OtherANALGESIA AND DRUGS OF ABUSE
Substance P Release in the Rat Periaqueductal Gray and Preoptic Anterior Hypothalamus after Noxious Cold Stimulation: Effect of Selective Mu and Kappa Opioid Agonists
Li Xin, Ellen B. Geller, Lee-Yuan Liu-Chen, Chongguang Chen and Martin W. Adler
Journal of Pharmacology and Experimental Therapeutics August 1997, 282 (2) 1055-1063;