7111
Patients with low probability of having aluminum overload ( serum iron levels < 40 micrograms / L and DAI < 150 micrograms / L ) had significantly higher values of serum iron , iron transferrin saturation , and serum ferritin levels compared with those patients with a high probability of having aluminum overload ( serum aluminum levels > 40 micrograms / L and DAI > 150 micrograms / L ) .
 transferrin, serum ferritin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 transferrin, serum ferritin