title: EndorphIns, i presume--or hyperventilation?
mesh_terms: D002560:Cerebrovascular Circulation; D004723:Endorphins / Q000502:physiology*; D006801:Humans; D006985:Hyperventilation / Q000503:physiopathology*; D010146:Pain / Q000503:physiopathology
chemical_list: D004723:Endorphins