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: RESULTS : Verapamil significantly increased PRL levels in healthy controls ( N . 8 , PRL : 183 % ) , macroprolactinoma ( N . 8 , PRL : 7 % ) , microprolactinoma ( N . 19 , PRL : 21 % ) , macroprolactinemia ( N . 23 , PRL : 126 % ) , but not in pseudoprolactinoma ( N . 8 , PRL : 0 . 8 % ) , and risperidone - induced hyperprolactinemia ( N . 7 , PRL : 3 % ) .
### Output Text:
RESULTS : <span class="chemical">Verapamil</span> significantly increased PRL levels in healthy controls ( N . 8 , PRL : 183 % ) , macroprolactinoma ( N . 8 , PRL : 7 % ) , microprolactinoma ( N . 19 , PRL : 21 % ) , macroprolactinemia ( N . 23 , PRL : 126 % ) , but not in pseudoprolactinoma ( N . 8 , PRL : 0 . 8 % ) , and <span class="chemical">risperidone</span> - induced hyperprolactinemia ( N . 7 , PRL : 3 % ) . 