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: To clarify whether colchicine is excreted in breast milk , and to compare its concentrations in the serum and breast milk of lactating women who have familial Mediterranean fever ( FMF ) .
### Output Text:
To clarify whether colchicine is excreted in breast milk , and to compare its concentrations in the serum and breast milk of lactating women who have <span class="disease">familial Mediterranean fever</span> ( <span class="disease">FMF</span> ) . 