12828
In combination with data from previous smoke inhalation studies with A / J mice , the current data suggest that this model for MS inhalation - induced pulmonary tumorigenesis is reliable and relevant , two crucial requirements towards validation of such a model .
 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