1641
All 8 ( 100 % ) patients with fulminant hepatic failure who received grafts survived , including 3 who received ABO - incompatible grafts , though 2 of these subsequently required retransplantation .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None