16075
Conversely , cardiomyocyte proliferation rates dramatically declined ( p < 0 . 01 ) at HH16 and HH20 as PCB exposure concentrations increased .
 Chemical: PCB
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PCB