“…Hirschsprung disease is a less common disorder of the enteric nervous system, affecting the colon in about 1/1500 children, with epidemiology very similar to pyloric stenosis: >80% males, excessive in frequency among twins, even more highly heritable than pyloric stenosis and even more rarely concordant in twins (Bolande, 1997;Jones, 1990;Kenny et al 2010;Martucciello, 1977;Moore, 2006;Shahar & Shinawi, 2003;Tam, 1986;Tam & Garcia-Barceló, 2009;Templeton, 1977).…”