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The objective of this study was to explore the functional anatomy of the globus pallidus internus ( GPi ) by studying the effects of unilateral pallidotomy on parkinsonian ' off ' signs and levodopa - induced dyskinesias ( LID ) .
 Disease: parkinsonian; Chemical: levodopa; Disease: dyskinesias; Disease: LID
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:
 Disease: parkinsonian; Chemical: levodopa; Disease: dyskinesias; Disease: LID