In the sentence extracted from biomedical literature, identify all the disease entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="disease"> to denote a disease.

### Input Text: In contrast , a vector derived from a recombinant adenovirus can restore 10 % - 80 % of normal hepatic PAH activity into PAH - deficient mice , which completely normalizes serum phenylalanine levels .
### Output Text:
In contrast , a vector derived from a recombinant adenovirus can restore 10 % - 80 % of normal hepatic PAH activity into <span class="disease">PAH - deficient</span> mice , which completely normalizes serum phenylalanine levels . 