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There is now evidence to suggest a central role for the dopaminergic system in restless legs syndrome ( RLS ) .
 Disease: restless legs syndrome; Disease: RLS
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: restless legs syndrome; Disease: RLS