1089
Considering the small increase in the patient ' s independence , the high costs of bilateral implants , and the difficulty most patients experience in handling the devices , the question arises as to whether bilateral pallidal stimulation is a real alternative to pallidotomy .
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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:
 None