2569
However , a 14 % ( from 70 + / - 8 % to 60 + / - 7 % ) reduction in S ( c ) O ( 2 ) ( P < 0 . 05 ) followed with no change in CO ( 3 . 7 + / - 1 . 1 to 3 . 4 + / - 0 . 9 l min ( - 1 ) ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 None