<qa>  What was the study of nebivolol?This study was a multi-center, multi-national, randomized, double-blind, parallel group, placebo-controlled study of nebivolol over a range of doses in patients with mild to moderate hypertension. The study consisted of 2 phases: screeningwashoutsingle-blind placebo run-in and 2 randomizationdouble-blind treatment. Patients had 7 scheduled clinic visits during the study. 