4349
METHODS : Forty patients with Parkinson ' s disease underwent serial , detailed assessments both after drug withdrawal ( " off " period ) and while taking their optimal medical regimens ( " on " period ) .
 Disease: Parkinson ' s disease
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: Parkinson ' s disease