Methods: People born in Iraq or Sweden, who were 30–75 years of age, were invited from 2010 to 2012 to participate in the population based MEDIM study including a health exam, fasting blood sampling, assessment of insulin secretion and action (through oral glucose tolerance test) and questionnaires assessing history of CVD, cancer and T2D. The gene discussed is INS; the disease is type 2 diabetes mellitus.