9542
Clonogenic data revealed dose - dependent decrease of cell proliferative capacity in all cell lines , still the SH - SY5Y cells were the most sensitive ones : the lowest dose ( 20 mu gBeq / ml ) produced 90 % cell decrease .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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