11779
Indeed , we also show that DIO ghrelin - knockout mice exhibit reduced body weight regain after CR weight loss compared with ghrelin wild - type mice , suggesting ghrelin mediates rebound weight gain after CR weight loss .
 None
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:
 None