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: However , in a small subset of hemizygous males who suffer from chronic nonspherocytic hemolytic anemia , the underlying mutations ( designated class I ) cause more - severe G6PD deficiency , and this might provide an opportunity for selection in heterozygous females during development .
### Output Text:
However , in a small subset of hemizygous males who suffer from <span class="disease">chronic nonspherocytic hemolytic anemia</span> , the underlying mutations ( designated class I ) cause more - severe <span class="disease">G6PD deficiency</span> , and this might provide an opportunity for selection in heterozygous females during development . 