4470
At the end of the experiment the urinary porphyrin excretion and the porphyrin content in lijver and skin were diminished in HCB - CQ - treated animals by about 50 % compared to the HCB controls .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None