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: This case contributes to the previous observations that non - metastasizing hepatic neoplasms and peliosis can develop in patients with androgen - and corticosteroid - treated Fanconi ' s anemia .
### Output Text:
This case contributes to the previous observations that non - metastasizing hepatic neoplasms and peliosis can develop in patients with <span class="chemical">androgen</span> - and <span class="chemical">corticosteroid</span> - treated Fanconi ' s anemia . 