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High - fat feeding or CNS leptin overexpression in chow - fed rats results in a region - specific cellular leptin resistance in medial basal hypothalamic regions and the ventral tegmental area ( VTA ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None