3929
Side effect including subjective and objective symptoms were strictly evaluated in 163 cases ( KS - R1 group in 83 cases , oral group in 80 cases ) , but the incidence rate which was 22 . 9 % for the KS - R1 group and 23 . 8 % for the oral group showed no significant difference .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None