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:

[ Clinical study on retarding aging effect of tongbu recipe to traditional Chinese medicine ] . OBJECTIVE To study the mechanism of Tongbu No . 1 ( TB1 , a prescription for reinforcing Kidney and Spleen , clearing up the bowel viscera to send Turbid downward and regulating Qi and blood ) in retarding aging . METHODS A controlled , multiple indexes study was conducted in 56 old subjects randomized into 3 groups . RESULTS TB1 ( containing ginseng leaf , cistanche , fleeceflower root , immature bitter orange , rhubarb , etc ) could improve various symptoms of aging , and had the effect in regulating immune and endocrinal function , scavenging free radicals and adjusting coli flora . The effects of TB1 and TB2 ( containing ginseng leaf , cistanche and fleeceflower root ) were different significantly ( P < 0.05 , P < 0.01 ) . CONCLUSION TB1 has a good comprehensive effect in retarding aging .
{"Intervention": [".", "TB1", "Tongbu No"], "Outcome": ["adjusting coli flora", "retarding aging", "regulating immune and endocrinal function", "scavenging free radicals", "retarding aging effect"], "Participant": ["old", "56"]}