Efficacy of solifenacin in patients previously treated with tolterodine extended release 4 mg: results of a 12-week, multicenter, open-label, flexible-dose study.
Chancellor MB, Zinner N, Whitmore K, Kobashi K, Snyder JA, Siami P, Karram M, Laramée C, Capo' JP Jr, Seifeldin R, et al. Clin Ther. 2008 Oct; 30(10):1766-81.