966
Using macaque monkeys with different types of MPTP - induced parkinsonism , the current study evaluated the degree to which rate of symptom progression , symptom severity , and response to and duration of levodopa therapy may be involved in the development of LIDs .
 MPTP, parkinsonism, levodopa, LIDs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 MPTP, parkinsonism, levodopa, LIDs