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: Genetic analysis of the family with two sibs affected by SJS type 2 showed evidence against linkage to chromosome 1p36 - 34 .
### Output Text:
Genetic analysis of the family with two sibs affected by <span class="disease">SJS type 2</span> showed evidence against linkage to chromosome 1p36 - 34 . 