title: Pain: persistence and disease.
mesh_terms: D000818:Animals; D004399:Dynorphins / Q000502:physiology; D009619:Nociceptors / Q000502:physiology; D010146:Pain / Q000276:immunology / Q000503:physiopathology*; D051381:Rats; D009435:Synaptic Transmission
chemical_list: D004399:Dynorphins