PT - JOURNAL ARTICLE AU - Hongmei Liu AU - Xuefeng Liu AU - Jinlong Yao AU - Changlin Wang AU - Ye Yu AU - Rui Wang TI - Utilization of combined chemical modifications to enhance the blood-brain barrier permeability and pharmacological activity of endomorphin-1 AID - 10.1124/jpet.106.106484 DP - 2006 Jun 27 TA - Journal of Pharmacology and Experimental Therapeutics 4099 - http://jpet.aspetjournals.org/content/early/2006/06/27/jpet.106.106484.short 4100 - http://jpet.aspetjournals.org/content/early/2006/06/27/jpet.106.106484.full