Treatment of vestibular vertigo: comparison of a fixed combination of cinnarizine 20 mg and dimenhydrinate 40 mg with the 2.5-fold higher dosed active drugs in monotherapy. A prospective, randomized, reference-controlled, two-center, double-blind study - Kessler, L; Bognar-Steinberg, I; Baumann, W (Arch Sensol Neurootol Sci Pract, 2012)