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: The mouse WASP gene , the homolog of the gene mutated in Wiskott - Aldrich syndrome , has been isolated and sequenced . the predicted amino acid sequence is 86 % identical to the human WASP sequence .
### Output Text:
The mouse WASP gene , the homolog of the gene mutated in <span class="disease">Wiskott - Aldrich syndrome</span> , has been isolated and sequenced . the predicted amino acid sequence is 86 % identical to the human WASP sequence . 