3226
The percentage RFR reduction at the end of CPB showed significant correlation with 1 ) CPB duration ( r = 0 . 49 ) , 2 ) oxygen flow rate index ( OFRI ) , i . e . flow / min in the bubble oxygenator / m2 bsa ( r = 0 . 38 ) , and 3 ) blood flow rate index ( BFRI ) , i . e . average volume of blood pumped through the heart - lung machine / min CPB time / m2 bsa ( r = 0 . 51 ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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