A. Sokhal et al., “Do pre-operative alpha blockers facilitate ureteroscope insertion at the vesico-ureteric junction? An answer from a prostective case–controlled study,” Eur Med J, vol. 2, pp. 82–86, 2017.
 N. Rashahmadi, H. Sofimajidpour, A. Saedi, and G. Moradi, “The effect of tamsulosin on the quality and complications of ureteroscopy: A double blind clinical trial,” Med Sci, vol. 22, pp. 272–278, 2018.
 M. AHMED, A. L. I. M. GHONEIM, A. B. D. E.-H. M. EL-BAHNASY, and M. R. MAGED, “Study of the Effect of Tamsulosin HCl (an Alpha-1 Receptor Antagonist) as a Medical Expelling Agent on Subsequent Ureteroscopic Procedure for Treatment of Lower Ureteric Stones,” Med. J. Cairo Univ., vol. 86, no. September, pp. 2881–2889, 2018.
 S. Erturhan, Ö. Bayrak, H. Şen, A. E. Yılmaz, and İ. Seçkiner, “Can alpha blockers facilitate the placement of ureteral access sheaths in retrograde intrarenal surgery?,” Turkish J. Urol., vol. 45, no. 2, p. 108, 2019.
 E. Perez-Castro Ellendt, “Laureterorrenoscopia transuretral: un actual proceder urologico,” Arch. Esp. Urol., vol. 33, pp. 445–460, 1980.
 M. H. Ather, J. Paryani, A. Memon, and M. N. Sulaiman, “A 10‐year experience of managing ureteric calculi: changing trends towards endourological intervention—is there a role for open surgery?,” BJU Int., vol. 88, no. 3, pp. 173–177, 2001.
 R. Bhattar, V. Jain, V. Tomar, and S. S. Yadav, “Safety and efficacy of silodosin and tadalafil in ease of negotiation of large ureteroscope in the management of ureteral stone: A prosective randomized trial,” Turkish J. Urol., vol. 43, no. 4, p. 484, 2017.
 P. Geavlete, D. Georgescu, G. NiţĂ, V. Mirciulescu, and V. Cauni, “Complications of 2735 retrograde semirigid ureteroscopy procedures: a single-center experience,” J. Endourol., vol. 20, no. 3, pp. 179–185, 2006.
 A. Mohey, T. M. Gharib, H. Alazaby, M. Khalil, A. Abou-Taleb, and Y. A. Noureldin, “Efficacy of silodosin on the outcome of semi-rigid ureteroscopy for the management of large distal ureteric stones: blinded randomised trial,” Arab J. Urol., vol. 16, no. 4, pp. 422–428, 2018.
 J. Rajpathy, K. Aswathaman, M. Sinha, S. Subramani, G. Gopalakrishnan, and N. S. Kekre, “An in vitro study on human ureteric smooth muscle with the α1‐adrenoceptor subtype blocker, tamsulosin,” BJU Int., vol. 102, no. 11, pp. 1743–1745, 2008.
 Y. Itoh, Y. Kojima, T. Yasui, K. Tozawa, S. Sasaki, and K. Kohri, “Examination of alpha 1 adrenoceptor subtypes in the human ureter,” Int. J. Urol., vol. 14, no. 8, pp. 749–753, 2007.
 A. Ueno, T. Kawamura, A. Ogawa, and H. Takayasu, “Relation of spontaneous passage of ureteral calculi to size,” Urology, vol. 10, no. 6, pp. 544–546, 1977.
 M. S. Griwan, S. K. Singh, H. Paul, D. S. Pawar, and M. Verma, “The efficacy of tamsulosin in lower ureteral calculi,” Urol. Ann., vol. 2, no. 2, p. 63, 2010.
 A. S. Abdelaziz and A. M. Kidder, “Tamsulosin therapy improved the outcome of ureterorenoscopy for lower ureteral stones: A prospective, randomised, controlled, clinical trial,” African J. Urol., vol. 23, no. 2, pp. 148–153, 2017.
 V. Romero, H. Akpinar, and D. G. Assimos, “Kidney stones: a global picture of prevalence, incidence, and associated risk factors,” Rev. Urol., vol. 12, no. 2–3, p. e86, 2010.
 S. Neeli, “Effect of tamsulosin versus tamsulosin plus tadalafil on renal calculus clearance after shock wave lithotripsy: An open-labelled, randomised, prospective study,” Asian J. Urol., 2021.
 A. Bourdoumis, C. Tanabalan, A. Goyal, S. Kachrilas, N. Buchholz, and J. Masood, “The difficult ureter: stent and come back or balloon dilate and proceed with ureteroscopy? What does the evidence say?,” Urology, vol. 83, no. 1, pp. 1–3, 2014.
 O. M. Aboumarzouk, S. G. Kata, F. X. Keeley, and G. Nabi, “Extracorporeal shock wave lithotripsy (ESWL) versus ureteroscopic management for ureteric calculi,” Cochrane Database Syst. Rev., no. 12, 2011.
 F. Yencilek, K. Sarica, S. Erturhan, F. Yagci, and A. Erbagci, “Treatment of ureteral calculi with semirigid ureteroscopy: where should we stop?,” Urol. Int., vol. 84, no. 3, pp. 260–264, 2010.
 K. Bensalah, M. Pearle, and Y. Lotan, “Cost-effectiveness of medical expulsive therapy using alpha-blockers for the treatment of distal ureteral stones,” Eur. Urol., vol. 53, no. 2, pp. 411–419, 2008.
 M. Aydın, M. F. Kılınç, A. Yavuz, and G. Bayar, “Do alpha-1 antagonist medications affect the success of semi-rigid ureteroscopy? A prospective, randomised, single-blind, multicentric study,” Urolithiasis, vol. 46, no. 6, pp. 567–572, 2018.
 J. De La Rosette et al., “The clinical research office of the endourological society ureteroscopy global study: indications, complications, and outcomes in 11,885 patients,” J. Endourol., vol. 28, no. 2, pp. 131–139, 2014.
 H. M. Alaridy, K. M. A. Zwain, H. Q. Al-Mosawi, and N. R. Hadi, “Comparison of Silodosin, Tadalafil and Combinations Prior to Ureteroscopic Management of Ureteral Stones,” Syst. Rev. Pharm., vol. 11, no. 4, pp. 238–242, 2020.