title: In reply.
authors.affiliation: Department of Emergency Medicine, University of California, San Francisco, San Francisco, CA.
authors.forename: Ralph C
authors.initials: RC
authors.lastname: Wang
authors.affiliation: Department of Emergency Medicine, University of California, San Francisco, San Francisco, CA.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Rodriguez
authors.affiliation: Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA.
authors.forename: Stephen
authors.initials: S
authors.lastname: Shiboski
authors.affiliation: Department of Emergency Medicine, Los Angeles County at the University of Southern California, Los Angeles, CA.
authors.forename: Tarina L
authors.initials: TL
authors.lastname: Kang
authors.affiliation: Department of Emergency Medicine, John H. Stroger Jr. Hospital of Cook County, Chicago, IL.
authors.forename: John
authors.initials: J
authors.lastname: Bailitz
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014514:Ureteral Calculi / Q000000981:diagnostic imaging*