3828
Pneumatic dilation of the lower esophageal sphincter was accomplished by endoscopic visualization and positioning of a modified polyurethane dilator ( 90 F diameter ) without fluoroscopy in 17 consecutive patients with advanced symptomatic achalasia .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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