21299
The first and second principal components ( PCs ) were correlated with global responses to cadmium and phenanthrene , while correlations with the mixture treatments were found in the higher PCs .
 cadmium, phenanthrene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cadmium, phenanthrene