title: A retroperitoneal abscess causing hydronephrosis: An unusual sequela of ERCP.
authors.affiliation: Department of Internal Medicine, Scheper Hospital Emmen, Boermarkeweg 60, 7824 AA Emmen, The Netherlands.
authors.forename: E R
authors.initials: ER
authors.lastname: Goet
authors.forename: F G H
authors.initials: FG
authors.lastname: van der Kleij
authors.forename: W P
authors.initials: WP
authors.lastname: Haanstra