18374
We hypothesized that the risk of an emotional side effect to methylphenidate ( MPH ) treatment may be associated with NTF3 genotypes .
 Chemical: methylphenidate; 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: methylphenidate; Chemical: MPH