2904
At the maximal concentration assayed with non - cytotoxic effects ( CV80 under irradiated condition ) , all tested photoallergens induced a significant and a dose - dependent increase of intracellular IL - 18 following UVA irratiation , whereas photoirritants failed .
 None
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