4896
Thromboxane B2 increased ( 97 + / - 105 versus 40 + / - 26 pg / ml ) and was significantly higher during heparin free hemodialysis than during hemodialysis with heparin ( p = 0 . 01 , Wilcoxon matched pairs signed rank test ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None