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: Increased CHD in men with mutations was primarily observed for HDL chol 41 - 60 mg / dl ; for HDL chol > 60 mg / dl men with and without mutations had low CHD prevalence .
### Output Text:
Increased <span class="disease">CHD</span> in men with mutations was primarily observed for HDL chol 41 - 60 mg / dl ; for HDL chol > 60 mg / dl men with and without mutations had low <span class="disease">CHD</span> prevalence . 