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 aim of the study was to examine the influence of hyperprolactinemia , induced by haloperidol ( HAL ) on age related morphology and function changes of epithelial cells in rat prostate lateral lobe .
### Output Text:
The aim of the study was to examine the influence of hyperprolactinemia , induced by <span class="chemical">haloperidol</span> ( <span class="chemical">HAL</span> ) on age related morphology and function changes of epithelial cells in rat prostate lateral lobe . 