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 : Four males ( age 6 - 11 years ) with Diagnostic and Statistical Manual of Mental Disorders ( fourth edition ) bipolar disorder or psychoses , with risperidone - induced elevations in serum prolactin levels ( 57 . 5 - 129 ng / mL , normal 5 - 15 ng / mL ) , were treated with cabergoline ( mean dose 2 . 13 + / - 0 . 09 mg / week ) .
### Output Text:
RESULTS : Four males ( age 6 - 11 years ) with Diagnostic and Statistical Manual of Mental Disorders ( fourth edition ) bipolar disorder or psychoses , with <span class="chemical">risperidone</span> - induced elevations in serum prolactin levels ( 57 . 5 - 129 ng / mL , normal 5 - 15 ng / mL ) , were treated with <span class="chemical">cabergoline</span> ( mean dose 2 . 13 + / - 0 . 09 mg / week ) . 