9706
In rat pups that were iodide deficient during gestation and lactation , these decreases in serum T4 levels were associated with declines in thyroid hormone in the fetal brain and a suppression of synaptic responses in the hippocampal region of the brain of the adult offspring ( Gilbert et al . , 2013 ) .
 Chemical: iodide; Chemical: thyroid hormone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: iodide; Chemical: thyroid hormone