968
In contrast , monkeys with long - term MPTP exposure , slow symptom progression and / or long symptom duration prior to initiation of levodopa therapy were more resistant to developing LIDs ( e . g . , dyskinesia developed no sooner than 146 days of chronic levodopa administration ) .
 MPTP, levodopa, LIDs, dyskinesia, levodopa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 MPTP, levodopa, LIDs, dyskinesia, levodopa