4592
Stereological analyses reveal a correlation between incidence of insulitis and the number of islets showing loss of peri - islet BM versus islets with intact BMs , suggesting that leukocyte penetration of the peri - islet BM is a critical step .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None