You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Outcome", "Participant", "Intervention"].

Please return the output as a JSON object of the format: {"Participant" : ["patients with COPD", ...], "Intervention" : ["Atenolol", ...], "Outcome" : ["blood pressure", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Comparison of endotracheal and peripheral intravenous adrenaline in cardiac arrest . Is the endotracheal route reliable ? Twelve patients presenting to an accident and emergency department in asystolic cardiac arrest were randomly allocated to treatment with endotracheal adrenaline ( five patients ) or peripheral intravenous adrenaline ( seven patients ) . Femoral-artery blood samples were taken for assay of adrenaline and noradrenaline . After intravenous adrenaline there was a good clinical and biochemical response , but after endotracheal adrenaline there was no change in serum adrenaline and no measurable clinical response . The endotracheal route of adrenaline administration is not reliable in out-of-hospital cardiac arrest .
{"Intervention": ["endotracheal and peripheral intravenous adrenaline", "endotracheal adrenaline", "peripheral intravenous adrenaline", "adrenaline", "noradrenaline"], "Outcome": ["clinical and biochemical response", "no change in serum adrenaline", "measurable clinical response"], "Participant": ["Twelve", "cardiac arrest ."]}