Yi, Junseok, Seong Jin Jeong, Min Soo Chung, Hongzoo Park, Sang Wook Lee, Seung Hwan Doo, Cheol Yong Yoon, Sung Kyu Hong, Seok-Soo Byun, and Sang Eun Lee. 2013. “Efficacy and Tolerability of Combined Medication of Two Different Antimuscarinics for Treatment of Adults With Idiopathic Overactive Bladder in Whom a Single Agent Antimuscarinic Therapy Failed”. Canadian Urological Association Journal 7 (1-2):E88-92. https://doi.org/10.5489/cuaj.269.