External Validation of the STONE Score, a Clinical Prediction Rule for Ureteral Stone: An Observational Multi-institutional Study.

"Funding and support: By Annals policy, all authors are required to disclose any and all commercial, financial, and other relationships in any way related to the subject of this article as per ICMJE conflict of interest guidelines (see www.icmje.org). The authors have stated that no such relationships exist and provided the following details: This study was supported by funding from Agency for Healthcare Research and Quality (AHRQ) grant K08 HS02181 and National Center for Advancing Translational Sciences (NCATS) grant 8 KL2 TR000143-08. The Study of Ultrasonography Versus Computed Tomography for Suspected Nephrolithiasis was supported by the American Recovery and Reinvestment Act of 2009 through AHRQ grant R01HS019312."

"Funding and support: By Annals policy, all authors are required to disclose any and all commercial, financial, and other relationships in any way related to the subject of this article as per ICMJE conflict of interest guidelines (see www.icmje.org ). The authors have stated that no such relationships exist and provided the following details: This study was supported by funding from Agency for Healthcare Research and Quality (AHRQ) grant K08 HS02181 and National Center for Advancing Translational Sciences (NCATS) grant 8 KL2 TR000143-08. The Study of Ultrasonography Versus Computed Tomography for Suspected Nephrolithiasis was supported by the American Recovery and Reinvestment Act of 2009 through AHRQ grant R01HS019312."

"Clinical trial registration number: NCT01451931"