3785
Using the prenatal valproic acid ( VPA ) - injection model of autism spectrum disorder ( ASD ) in rats , which produces social impairrment and altered seizure susceptibility as in human ASD patients as well as mild neural tube defects like crooked tail phenotype , we examined whether chronic administration of red ginseng extract may rescue the social impairment and crooked tail phenotype in prenatally VPA - exposed rat offspring .
 Chemical: valproic acid; Chemical: VPA; Chemical: VPA
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: valproic acid; Chemical: VPA; Chemical: VPA