SOD3 and type 2 diabetes mellitus: The main strengths of our study are the assessment of clinical phenotypes (myocardial infarction, cardiovascular and all-cause mortality) in three prospective cohorts of type 1 and type 2 diabetes and the genotyping of tagSNPs covering the haplotype block containing SOD3. We also investigated associations of the clinical phenotypes and SOD3 genotypes with three markers of redox status.