VDR and diabetes mellitus: BsmI polymorphism has been linked to susceptibility to diabetes in several countries.5,24 However, studies in other countries could not establish association between BsmI and existence of diabetes.25,26 In type 2 DM, a link between BsmI and the onset of the disease has been found in several countries.27,28 but not amongother populations.29,30 These variations may due to ethnic differences in VDR polymorphisms distribution that may have role in diabetes mellitus pathogenesis.