title: The effect of etorphine on the human esophagus: evidence for subtypes of opioid receptors in the esophagus.
mesh_terms: D000293:Adolescent; D000328:Adult; D004947:Esophagus / Q000032:analysis / Q000187:drug effects*; D005048:Etorphine / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D009019:Morphinans / Q000494:pharmacology*; D011957:Receptors, Opioid / Q000032:analysis
chemical_list: D009019:Morphinans; D011957:Receptors, Opioid; D005048:Etorphine