30150
Four of them were involved in immune diseases , including autoimmune thyroid disease , graft - versus - host disease , allograft rejection , and type I diabetes mellitus ( T1MD ) , which was confirmed by the decrease in serum insulin .
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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:
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