title: Response to the letter to the editor: 1q gain is a frequent finding in preoperatively treated Wilms tumors, but of limited prognostic value for risk satisfaction in the SIOP2009/Gesellschaft für Pädiatrische Onkologie und Hämatologie (GPOH) trial.
authors.affiliation: University College London Institute of Child Health, London, WC1N 1EH, UK.
authors.forename: Kathy
authors.initials: K
authors.lastname: Pritchard-Jones
authors.forename: Richard
authors.initials: R
authors.lastname: Williams
authors.forename: Heidi
authors.initials: H
authors.lastname: Segers
authors.forename: Marry
authors.initials: M
authors.lastname: van den Heuvel-Eibrink
authors.forename: Rob
authors.initials: R
authors.lastname: Pieters
authors.forename: Harm
authors.initials: H
authors.lastname: van Tinteren
authors.forename: Gordan
authors.initials: G
authors.lastname: Vujanic
authors.forename: Nick
authors.initials: N
authors.lastname: Bown
mesh_terms: D058674:Chromosome Duplication; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D006801:Humans; D007680:Kidney Neoplasms / Q000235:genetics* / Q000401:mortality*; D009396:Wilms Tumor / Q000235:genetics* / Q000401:mortality*