DDX11 and Warsaw breakage syndrome: Biallelic mutations in DDX11 result in a rare disease termed Warsaw breakage syndrome (WABS) that is associated with severe developmental defects, including microcephaly, growth retardation, and facial dysmorphy (van der Lelij et al, 2010;,  Capo-Chichi et al, 2013;,  Bailey et al, 2015;, Alkhunaizi et al, 2018).