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: Rats with lithium - induced nephropathy were subjected to high protein ( HP ) feeding , uninephrectomy ( NX ) or a combination of these , in an attempt to induce glomerular hyperfiltration and further progression of renal failure .
### Output Text:
Rats with <span class="chemical">lithium</span> - induced nephropathy were subjected to high protein ( HP ) feeding , uninephrectomy ( NX ) or a combination of these , in an attempt to induce glomerular hyperfiltration and further progression of renal failure . 