1 Izetbegovic Izetbegovic S S Occurrence of ABO and RhD incompatibility with Rh negative mothers Occurrence of ABO and RhD incompatibility with Rh negative mothers Mater Sociomed Mater Sociomed 2013 2013 12 12 25 25 4 4 255 255 8 8 24511269 24511269. The gene discussed is ABO; the disease is rheumatic heart disease.