2899
We have previously demonstrated the possibility to use the human keratinocyte cell line NCTC2455 and the production of interleukin - 18 ( IL - 18 ) to screen low molecular weight sensitizers .
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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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