24099
Study 833 ( n = 345 ) did not show significance ( estimated drug - placebo differences of 30 mg : - 1 . 67 , 95 % CI ( - 3 . 73 to 0 . 39 ) p = 0 . 1122 ; 60 mg : - 0 . 76 , 95 % CI ( - 2 . 85 to 1 . 32 ) p = 0 . 4713 ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None