title: Letter: "Purinergic" neurotransmitters in the esophagus.
mesh_terms: D000255:Adenosine Triphosphate / Q000502:physiology; D000818:Animals; D004947:Esophagus / Q000294:innervation / Q000502:physiology*; D006168:Guinea Pigs; D011687:Purines; D009435:Synaptic Transmission
chemical_list: D011687:Purines; D000255:Adenosine Triphosphate