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: In the NASCIS , there was no mention regarding the possibility of acute corticosteroid myopathy that high - dose methylprednisolone may cause .
### Output Text:
In the NASCIS , there was no mention regarding the possibility of acute <span class="chemical">corticosteroid</span> myopathy that high - dose <span class="chemical">methylprednisolone</span> may cause . 