6161
Retraction to : Biol Trace Elem Res 144 ( 1 - 3 ) : 1120 - 1132 , DOI 10 . 1007 / s12011 - 011 - 9149 - z .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None