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: The Fas / Apo - 1 receptor plays a crucial role in the regulation of apoptosis , as demonstrated by lymphoproliferation in MRL - lpr / lpr mice and by the recently described autoimmune lymphoproliferative syndrome ( ALPS ) in humans , both of which are due to mutations in the Fas gene .
### Output Text:
The Fas / Apo - 1 receptor plays a crucial role in the regulation of apoptosis , as demonstrated by lymphoproliferation in MRL - lpr / lpr mice and by the recently described <span class="disease">autoimmune lymphoproliferative syndrome</span> ( <span class="disease">ALPS</span> ) in humans , both of which are due to mutations in the Fas gene . 