96
We recently reported that HFE , the protein defective in HH , was physically associated with the transferrin receptor ( TfR ) in duodenal crypt cells and proposed that mutations in HFE attenuate the uptake of transferrin - bound iron from plasma by duodenal crypt cells , leading to up - regulation of transporters for dietary iron .
 HH
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 HH