By clicking on the ‘Clinical data’ tab, the user can obtain the number of patients listed in the database carrying a given mutation, and information about the overall distribution of phenotypes, the severity of the disease in BMD patients, the presence or absence of cardiomyopathy and mental retardation and the size and amount of dystrophin (when such data are available) (Figure 4B). This evidence concerns the gene DMD and cardiomyopathy.