title: Erratum to: Age-related delay in urinary stone clearance in elderly patients with solitary proximal ureteral calculi treated by extracorporeal shock wave lithotripsy.
authors.affiliation: Department of Urology, Yamagata University Faculty of Medicine, Iida-Nishi 2-2-2, Yamagata City, Yamagata Prefecture, Japan. o.ichiyanagi@med.id.yamagata-u.ac.jp.
authors.forename: Osamu
authors.initials: O
authors.lastname: Ichiyanagi
authors.affiliation: Department of Urology, Yamagata University Faculty of Medicine, Iida-Nishi 2-2-2, Yamagata City, Yamagata Prefecture, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Nagaoka
authors.affiliation: Department of Urology, South Miyagi Medical Center, Aza-nishi 38-1, Ogawara Town, Miyagi Prefecture, Japan.
authors.forename: Takuji
authors.initials: T
authors.lastname: Izumi
authors.affiliation: Department of Urology, South Miyagi Medical Center, Aza-nishi 38-1, Ogawara Town, Miyagi Prefecture, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kawamura
authors.affiliation: Department of Urology, Yamagata University Faculty of Medicine, Iida-Nishi 2-2-2, Yamagata City, Yamagata Prefecture, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Kato