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Valvular heart abnormalities have been reported in patients with Parkinson ' s disease ( PD ) treated with pergolide .
 Valvular heart abnormalities, Parkinson ' s disease, PD, pergolide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Valvular heart abnormalities, Parkinson ' s disease, PD, pergolide