435
Mast cells appeared in the connective and muscular layers of the bladder at a much higher number in DBA / 2 mice than in C57BL / 6 mice or untreated controls .
 None
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