Occurrence of Esophageal Atresia With Tracheoesophageal Fistula in Siblings From Three-Generation Family Affected by Variable Expressivity MYCN Mutation: A Case Report oleh Magdalena Klaniewska, Krystian Toczewski, Anna Rozensztrauch, Michal Bloch, Agata Dzielendziak, Piotr Gasperowicz, Ryszard Slezak, Rafał Ploski, Małgorzata Rydzanicz, Robert Smigiel, Dariusz Patkowski