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 association remained after additional adjustment for diabetes , cholesterol level , systolic blood pressure , or alcohol use .
### Output Text:
The association remained after additional adjustment for diabetes , <span class="chemical">cholesterol</span> level , systolic blood pressure , or <span class="chemical">alcohol</span> use . 