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:

Effect of erythromycin and gentamicin on abomasal emptying rate in suckling calves . BACKGROUND Commonly used dosage protocols for antimicrobial agents may alter the rate of gastric emptying . HYPOTHESIS Parenteral administration of erythromycin increases and gentamicin decreases the rate of abomasal emptying . ANIMALS Five male Holstein-Friesian calves ( 8-15 days of age ) . METHODS Calves received each of the following 4 IM treatments in random order : control , 2 mL of 0.9 % NaCl ; erythromycin , 8.8 mg/kg ; low-dose gentamicin , 4.4 mg/kg ; high-dose gentamicin , 6.6 mg/kg . Abomasal emptying rate was assessed by acetaminophen and glucose absorption . Calves were fed 2 L of cow 's milk containing acetaminophen ( 50 mg/kg body weight ) 30 minutes after each treatment was administered , and jugular venous blood samples were obtained periodically after suckling . The maximum observed plasma acetaminophen concentration ( actual C ( max ) ) and time of actual C ( max ) ( actual T ( max ) ) were determined , and pharmacokinetic modeling was used to calculate model C ( max ) and model T ( max ) . RESULTS Erythromycin increased abomasal emptying rate , as indicated by a shorter time to actual T ( max ) and model T ( max ) ( P < .05 ) . Abomasal emptying rate after injection of low-dose gentamicin was similar to that of control . Administration of high-dose gentamicin resulted in a longer time to actual T ( max ) ( P= .021 ) but did not change model T ( max ) ( P= .62 ) . CONCLUSIONS AND CLINICAL RELEVANCE IM injection of erythromycin increased abomasal emptying rate in dairy calves , whereas low-dose and high-dose gentamicin did not alter the rate of abomasal emptying as measured by acetaminophen kinetics and glucose absorption . The clinical relevance of these findings remains to be determined .
{"Intervention": ["gentamicin", "control", "high-dose gentamicin", "erythromycin", "acetaminophen", "low-dose gentamicin"], "Outcome": ["rate of abomasal emptying", "abomasal emptying rate", "Abomasal emptying", "gastric emptying", "time of actual C ( max ) ( actual T ( max ) )", "time to actual T ( max )", "Abomasal emptying rate", "abomasal emptying", "acetaminophen and glucose absorption", "plasma acetaminophen concentration", "model T ( max )"], "Participant": []}