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: Renal lesions are similar to those seen in idiopathic HUS and include arteriolar fibrin thrombi , expanded subendothelial zones in glomerular capillary walls , ischemic wrinkling of glomerular basement membranes and mesangiolysis .
### Output Text:
Renal lesions are similar to those seen in idiopathic HUS and include arteriolar fibrin thrombi , expanded subendothelial zones in glomerular capillary walls , ischemic wrinkling of glomerular basement membranes and mesangiolysis . 