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: G6PD Santamaria might have been produced by recombination between G6PD A and G6PD Malaga ; however haplotype analysis , including the use of a new silent polymorphism , suggests that the same 542 A - - > T mutation has taken place independently in a G6PD B gene to give G6PD Malaga and in a G6PD A gene to give G6PD Santamaria .
### Output Text:
G6PD Santamaria might have been produced by recombination between G6PD A and G6PD Malaga ; however haplotype analysis , including the use of a new silent polymorphism , suggests that the same 542 A - - > T mutation has taken place independently in a G6PD B gene to give G6PD Malaga and in a G6PD A gene to give G6PD Santamaria . 