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: Moreover , human VLCAD and human acyl - CoA oxidase showed extensive sequence homology corroborating the notion that these genes are evolutionarily related .
### Output Text:
Moreover , human VLCAD and human acyl - CoA oxidase showed extensive sequence homology corroborating the notion that these genes are evolutionarily related . 