18375
Ninety - six medication - na i ve children with ADHD ( mean age 8 . 70 , standard deviation 1 . 41 years , 79 males ) were genotyped and treated with MPH .
 Chemical: MPH
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: MPH