title: Persistent flank pain without active urinary sediments.
authors.affiliation: Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China.
authors.forename: S-H
authors.initials: SH
authors.lastname: Tsai
authors.forename: S-J
authors.initials: SJ
authors.lastname: Chu
authors.forename: S-J
authors.initials: SJ
authors.lastname: Chen