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: To determine mitochondrial events from HAART in vivo , 8 - week - old hemizygous transgenic AIDS mice ( NL4 - 3Delta gag / pol ; TG ) and wild - type FVB / n littermates were treated with the HAART combination of zidovudine , lamivudine , and indinavir or vehicle control for 10 days or 35 days .
### Output Text:
To determine mitochondrial events from HAART in vivo , 8 - week - old hemizygous transgenic AIDS mice ( NL4 - 3Delta gag / pol ; TG ) and wild - type FVB / n littermates were treated with the HAART combination of <span class="chemical">zidovudine</span> , <span class="chemical">lamivudine</span> , and <span class="chemical">indinavir</span> or vehicle control for 10 days or 35 days . 