3630
In 24 of these patients chemical cystitis was severe enough for them to drop out of the study .
 Disease: cystitis
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: cystitis 
Answer:
 Disease: cystitis