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4. Induction of tolerance to the analgesic action of lipotropin in C-fragment. van Ree JM; de Wied D; Bradbury AF; Hulme EC; Smyth DC; Snell CR Nature; 1976 Dec 23-30; 264(5588):792-4. PubMed ID: 1012322 [No Abstract] [Full Text] [Related]
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6. Amniotic-fluid ingestion enhances the central analgesic effect of morphine. Di Pirro JM; Thompson AC; Kristal MB Brain Res Bull; 1991 Jun; 26(6):851-5. PubMed ID: 1933405 [TBL] [Abstract][Full Text] [Related]
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8. Analgesia induced in vivo by central administration of enkephalin in rat. Belluzzi JD; Grant N; Garsky V; Sarantakis D; Wise CD; Stein L Nature; 1976 Apr; 260(5552):625-6. PubMed ID: 1264229 [No Abstract] [Full Text] [Related]
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