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: Major depressive disorder ( OR = 2 . 870 , CI = 1 . 154 - 7 . 142 ) and antisocial personality disorder ( OR = 3 . 299 , 95 CI = 1 . 375 - 7 . 914 ) were the only factors associated with current psychosis .
### Output Text:
Major depressive disorder ( OR = 2 . 870 , CI = 1 . 154 - 7 . 142 ) and antisocial personality disorder ( OR = 3 . 299 , 95 CI = 1 . 375 - 7 . 914 ) were the only factors associated with current psychosis . 