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 human neuronal nicotinic acetylcholine receptor alpha 4 subunit gene ( CHRNA4 ) is located in the candidate region for three different phenotypes benign familial neonatal convulsions , autosomal dominant nocturnal frontal lobe epilepsy , and low - voltage EEG .
### Output Text:
The human neuronal nicotinic acetylcholine receptor alpha 4 subunit gene ( CHRNA4 ) is located in the candidate region for three different phenotypes <span class="disease">benign familial neonatal convulsions</span> , <span class="disease">autosomal dominant nocturnal frontal lobe epilepsy</span> , and low - voltage EEG . 