3758
Also , plasma levels of IGF1 were assessed and the gene expression of the GH receptors ( Ghr ) , Igf1 and Igf2 , in hippocampus and frontal cortex was analyzed .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None