2219
The aim of our study was to evaluate the level of oxidative stress in healthy controls ( CTL ) compared with CRF and HD patients before ( pre - HD ) and after ( post - HD ) the dialysis session , carried out on a high biocompatible polyacrylonitrile membrane AN69 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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