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: About 10 % of the homozygous mutant animals survived to adulthood but have a much shorter life span compared with wild - type mice .
### Output Text:
About 10 % of the homozygous mutant animals survived to adulthood but have a much shorter life span compared with wild - type mice . 