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CONCLUSIONS : In the literature , the most - frequent cause of hemolytic uremic syndrome in patients following renal transplantation is recurrence of the hemolytic uremic syndrome .
 hemolytic uremic syndrome, hemolytic uremic syndrome
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 hemolytic uremic syndrome, hemolytic uremic syndrome