title: Authors' response.
authors.affiliation: *Emma Children's Hospital/Academic Medical Centre, Amsterdam, The Netherlands †Nationwide Children's Hospital, Columbus, Ohio.
authors.forename: Merit M
authors.initials: MM
authors.lastname: Tabbers
authors.forename: Marc A
authors.initials: MA
authors.lastname: Benninga
authors.forename: Carlo
authors.initials: C
authors.lastname: Di Lorenzo
mesh_terms: D003248:Constipation / Q000628:therapy*; D005767:Gastrointestinal Diseases / Q000628:therapy*; D006801:Humans