title: Reply.
authors.affiliation: Department of Pediatrics.
authors.forename: Danielle
authors.initials: D
authors.lastname: Usatin
authors.affiliation: Department of Pediatrics.
authors.forename: Melissa
authors.initials: M
authors.lastname: Fernandes
authors.affiliation: Department of Epidemiology and Biostatistics.
authors.forename: Isabel E
authors.initials: IE
authors.lastname: Allen
authors.affiliation: Department of Pediatrics Department of Epidemiology and Biostatistics.
authors.forename: Emily R
authors.initials: ER
authors.lastname: Perito
authors.affiliation: Department of Medicine.
authors.forename: James
authors.initials: J
authors.lastname: Ostroff
authors.affiliation: Department of Pediatrics University of California, San Francisco San Francisco, California.
authors.forename: Melvin B
authors.initials: MB
authors.lastname: Heyman
mesh_terms: D002648:Child; D002760:Cholangiopancreatography, Endoscopic Retrograde; D006801:Humans; D050500:Pancreatitis, Chronic