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: However , the concomitant occurrence of HBeAg negativity ( PC / BCP ) , sP120T , and LAM resistance resulted in the restoration of replication to levels of wild - type HBV .
### Output Text:
However , the concomitant occurrence of <span class="chemical">HBeAg</span> negativity ( PC / BCP ) , sP120T , and <span class="chemical">LAM</span> resistance resulted in the restoration of replication to levels of wild - type HBV . 