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 rise in resting blood pressure with hydrocortisone is associated with an increased cardiac output ( presumably due to increased blood volume ) . ( ABSTRACT TRUNCATED AT 250 WORDS )
### Output Text:
The rise in resting blood pressure with <span class="chemical">hydrocortisone</span> is associated with an increased cardiac output ( presumably due to increased blood volume ) . ( ABSTRACT TRUNCATED AT 250 WORDS ) 