Opiates, opioid peptides, and immunity.
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004723:Endorphins / Q000494:pharmacology*; D006801:Humans; D007109:Immunity / Q000187:drug effects; D007239:Infections / Q000276:immunology*; D009294:Narcotics / Q000494:pharmacology*; D009374:Neoplasms, Experimental / Q000276:immunology*
D004723:Endorphins; D009294:Narcotics