4763
Although these data do not demonstrate cause and effect , they do suggest that decreased expression of Lin28a / Lin28b may facilitate the transition into puberty , consistent with previous data showing that overexpression of Lin28a in transgenic mice leads to delayed puberty .
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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