22924
Copper - related injuries were found to be the principal pathogenic process , but Fe - or adenosylhomocysteine - related injuries were also implicated .
 Copper, Fe, adenosylhomocysteine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Copper, Fe, adenosylhomocysteine