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: This clustering is not observed with a C - terminally deleted WASP and is inhibited by coexpression with dominant negative CDC42Hs - N17 , but not with dominant negative forms of Rac or Rho .
### Output Text:
This clustering is not observed with a C - terminally deleted WASP and is inhibited by coexpression with dominant negative CDC42Hs - N17 , but not with dominant negative forms of Rac or Rho . 