The database was retained by the sponsor, but the investigators had access to the complete database. The statistical analyses were performed by the sponsoring company's statistician and reviewed and approved by all authors. The authors assume full responsibility for the completeness and accuracy of the content of the manuscript. This clinical trial was registered on clinicaltrials.gov with registration number: NCT00384930

Use of alpha-adrenergic blockers for ureteral distal third stones has been shown to be effective for increasing the stone expulsion rate and even the number of stones passed, and for faster symptom relief.

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