354 P. Prospective randomized trial comparing efficacy of alfuzosin and tamsulosin in management of lower ureteral stones. Urology 2009;73:706-9. 21. Al-Ansari A, Al-Naimi A, Alobaidy A, Assadiq K, Azmi MD, Shokeir AA. Efficacy of tamsulosin in the management of lower ureteral stones: a randomized double-blind placebo-controlled study of 100 patients. Urology 2010;75:4-7. 22. Yoon WY, Jeong TY, Lee SI, Kim DJ. Effect of tamsulosin and di- chlozid on the expected treatment of ureteral calculi. Korean J Urol 2009;50:1213-8. 23. Kang DI, Cho WY, Kim TH, Chung JM, Park J, Yoon JH, et al. Effect of tamsulosin 0.2 mg on the short-term treatment of urinary stones: multicenter, prospective, randomized study. Korean J Urol 2009;50:586-90. 24. Kaneko T, Matsushima H, Morimoto H, Tsuzaka Y, Homma Y. Efficacy of low dose tamsulosin in medical expulsive therapy for Cha et al ureteral stones in Japanese male patients: a randomized con- trolled study. Int J Urol 2010;17:462-5. 25. Lojanapiwat B, Kochakarn W, Suparatchatpan N, Lertwutti- chaikul K. Effectiveness of low-dose and standard-dose tamsulo- sin in the treatment of distal ureteric stones: a randomized con- trolled study. J Int Med Res 2008;36:529-36. 26. Mondaini N, Giubilei G, Ungar A, Gontero P, Cai T, Gavazzi A, et al. Alfuzosin (10 mg) does not affect blood pressure in young healthy men. Eur Urol 2006;50:1292-6. 27. Porpiglia F, Vassino D, Volpe A, Renard J, Cracco C, Ragni F, et al. Is there a role for a second cycle of medical expulsive therapy with tamsulosin in patients with distal ureteral stones? Eur Urol Suppl 2007;6:116. 28. Hubner WA, Irby P, Stoller ML. Natural history and current con- cepts for the treatment of small ureteral calculi. Eur Urol 1993;24:172-6. Korean J Urol 2012;53:349-354