3497
However , no relationships between metal concentrations in soil or body metal concentrations and the whole - organism or cellular respiration rate could be detected when using mean values per site , underlining the crucial importance of incorporating individual variability in such analyses .
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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