A randomized, double-blind, placebo-controlled, fixed-dose, multicenter study of pregabalin in patients with generalized anxiety disorder - Feltner,D.E.; Crockatt,J.G.; Dubovsky,S.J.; Cohn,C.K.; Shrivastava,R.K.; Targum,S.D. (J Clin Psychopharmacol, 2003)