16930
The average concentration of the total PBDE ( sum 8 PBDE ) concentration in all serum pools was 240 ng / g lipid weight , and the highest serum pool concentration ( in the 30 - to 39 - yr - old male group ) was 780 ng / g lipid weight .
 Chemical: PBDE; Chemical: PBDE
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: PBDE; Chemical: PBDE