In the sentence extracted from biomedical literature, identify all the chemical entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="chemical"> to denote a chemical.

### Input Text: Analysis of data revealed a significant correlation between maximal cTnT and ED and ES LV diameters / BW ( r = 0 . 81 and 0 . 65 ; p < 0 . 0001 ) .
### Output Text:
Analysis of data revealed a significant correlation between maximal cTnT and ED and ES LV diameters / BW ( r = 0 . 81 and 0 . 65 ; p < 0 . 0001 ) . 