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 Emery - Dreifuss muscular dystrophy protein , emerin , is a nuclear membrane protein .
### Output Text:
The <span class="disease">Emery - Dreifuss muscular dystrophy</span> protein , emerin , is a nuclear membrane protein . 