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 randomized Aza patients had more overall infections ( P less than 0 . 05 ) and more nonviral infections ( P less than 0 . 02 ) than the randomized cyclosporine patients .
### Output Text:
The randomized <span class="chemical">Aza</span> patients had more overall infections ( P less than 0 . 05 ) and more nonviral infections ( P less than 0 . 02 ) than the randomized <span class="chemical">cyclosporine</span> patients . 