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: Azidothymidine ( AZT ) - induced anemia in mice can be reversed by the administration of IGF - IL - 3 ( fusion protein of insulin - like growth factor II ( IGF II ) and interleukin 3 ) .
### Output Text:
<span class="chemical">Azidothymidine</span> ( <span class="chemical">AZT</span> ) - induced anemia in mice can be reversed by the administration of IGF - IL - 3 ( fusion protein of insulin - like growth factor II ( IGF II ) and interleukin 3 ) . 