20285
In this functional magnetic resonance imaging ( fMRI ) study , we investigated differences in hypothalamic connectivity between " responders " ( reduction in energy intake after exenatide infusion ) and " nonresponders . " RESEARCH DESIGN AND METHODSWe performed a randomized , double - blinded , placebo - controlled , cross - over fMRI study with intravenous administration of exenatide in obese male volunteers .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
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