You will be shown inclusion or exclusion criteria for a clinical trial. Given these criteria, your task is to extract all unique entities of the following types: ["Observation", "Condition", "Procedure", "Drug", "Temporal", "Multiplier", "Qualifier", "Negation", "ReferencePoint", "Scope", "Value", "Mood", "Device", "Visit", "Measurement", "Person"].

Please return the output as a JSON object of the format: {"Condition" : ["breast cancer", ...], "Device" : ["ports", ...], "Drug" : ["Atenolol", ...], "Measurement" : ["blood pressure", ...], "Mood" : ["suspected", ...], "Multiplier" : ["more than two", ...], "Negation" : ["no", ...], "Observation" : ["history", ...], "Person" : ["male", ...], "Procedure" : ["surgery", ...], "Qualifier" : ["severe", ...], "ReferencePoint" : ["enrollment", ...], "Scope" : ["infection", ...], "Temporal" : ["one day", ...], "Value" : ["50%", ...], "Visit" : ["ICU", ...]}. 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:

Have participated in this study previously, or any other study using exenatide or GLP-1 analogs. 
Have participated in an interventional, medical, surgical, or pharmaceutical study within 30 days of screening. 
Have characteristics contraindicating metformin or sulfonylurea use. 
Have been treated with exogenous insulin for more than 1 week within the 3 months prior to screening. 
Have used drugs for weight loss within 1 month of screening.
{"Condition": ["characteristics contraindicating"], "Device": [], "Drug": ["sulfonylurea", "metformin", "GLP-1 analogs", "exogenous insulin", "drugs for weight loss", "exenatide"], "Measurement": [], "Mood": [], "Multiplier": ["for more than 1 week"], "Negation": [], "Observation": ["pharmaceutical study", "surgical study", "interventional study", "medical study", "any other study", "this study"], "Person": [], "Procedure": [], "Qualifier": [], "ReferencePoint": ["screening"], "Scope": ["exenatide or GLP-1 analogs", "this study previously, or any other study", "metformin or sulfonylurea", "interventional, medical, surgical, or pharmaceutical study"], "Temporal": ["within 30 days of screening", "within the 3 months prior to screening", "within 1 month of screening"], "Value": [], "Visit": []}