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: Mice lacking the myotonic dystrophy protein kinase develop a late onset progressive myopathy .
### Output Text:
Mice lacking the <span class="disease">myotonic dystrophy</span> protein kinase develop a late onset progressive <span class="disease">myopathy</span> . 