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: The development of severe CAB - induced anemia in prostate cancer patients did not correlate with T baseline values ( T < 3 ng / ml versus T > or = 3 ng / ml ) , with age ( < 76 yrs versus > or = 76 yrs ) , and clinical stage ( stage C versus stage D1 ) .
### Output Text:
The development of severe CAB - induced anemia in prostate cancer patients did not correlate with T baseline values ( T < 3 ng / ml versus T > or = 3 ng / ml ) , with age ( < 76 yrs versus > or = 76 yrs ) , and clinical stage ( stage C versus stage D1 ) . 