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: Conversion to SRL prevented CsA - induced renal damage evolution ( absent / mild grade lesions ) , while NGAL ( serum versus urine ) seems to be a feasible biomarker of CsA replacement to SRL .
### Output Text:
Conversion to <span class="chemical">SRL</span> prevented <span class="chemical">CsA</span> - induced renal damage evolution ( absent / mild grade lesions ) , while NGAL ( serum versus urine ) seems to be a feasible biomarker of <span class="chemical">CsA</span> replacement to <span class="chemical">SRL</span> . 