Furthermore, if we consider that the Roma population in Slovakia represents about 7.45% of the total population [33] and the prevalence of c.1331+2T>C homozygotes in GJB2 negative hearing impaired Romanies was shown to be 3.5%, we may estimate that MARVELD2 related deafness in Slovakia may affect up to approximately 80 families. The gene discussed is GJB2; the disease is deafness.