41
Patients were subclassified into age - matched groups of primary untreated cancer ( 21 ) , recurrent cancer ( 18 ) , and " cured " patients who had been free of disease for at least 9 months ( 16 ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None