title: Enkephalin-like material in normal human CSF: measurement and levels.
mesh_terms: D000328:Adult; D004723:Endorphins / Q000134:cerebrospinal fluid*; D004745:Enkephalins / Q000134:cerebrospinal fluid*; D006801:Humans; D008297:Male; D008722:Methods; D010146:Pain / Q000134:cerebrospinal fluid; D011957:Receptors, Opioid / Q000187:drug effects
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011957:Receptors, Opioid