MODY in Young-onset Diabetes in Different Ethnicities

Inclusion Criteria: * Diagnosed with diabetes on the basis of fasting glucose and/or oral glucose tolerance test and/or HbA1c as per WHO criteria. * Diagnosed with diabetes between 6 months and 30 years of age. * South Asian ancestry- defined as self-reported ancestry and at least 2 grandparents from the Indian Subcontinent (India, Pakistan, Bangladesh or Sri Lanka). * European ancestry - defined as self-reported ancestry and at least 2 grandparents from within Europe. Exclusion Criteria: * An established secondary cause of diabetes exists (for example recurrent pancreatitis, pancreatectomy, new onset diabetes after transplantation, Cushing's syndrome, acromegaly, steroid induced). * Enrolled in another study. * Have active malignancy or under investigation for malignancy.