3334
Moreover calcitonin induced a significant decrease in nigral GAD activity but no change in striatal DA and DOPAC concentration or GAD activity .
 Chemical: DA; Chemical: DOPAC
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: DA; Chemical: DOPAC