4775
HRES has been found to be clinically useful in assessing histologic damage following pneumatic dilatation and in localizing the LES during the administration of intrasphincter botulinum toxin injection in the treatment of achalasia .
 botulinum toxin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 botulinum toxin