DYNC1H1 and beta thalassemia: Each case harboured at least one additional genetic variant that included a beta thalassaemia trait, <i>Calmodulin 3</i> (<i>CALM3</i>) missense variant, maternally inherited 22q12.3 to q13.1 duplication, 7p14.3 and <i>Dynein Cytoplasmic 1 Heavy Chain 1</i> (<i>DYNC1H1</i>) variants of uncertain significance and a pathogenic <i>Set Domain-containing protein 5</i> (<i>SETD5</i>) variant.