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Therefore , we have reevaluated the age - related changes in serum leptin levels and their relationship with adiposity and androgen levels in a large group of community dwelling men .
 GENE: serum leptin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: serum leptin