Efficacy and Tolerability of a Standardized Herbal Product from Galphimia glauca on Generalized Anxiety Disorder. A Randomized, Double-Blind Clinical Trial Controlled with Lorazepam - Herrera-Arellano, Armando; Jiménez-Ferrer, Enrique; Zamilpa, Alejandro; Morales-Valdéz, Marisol; García-Valencia, Claudia E; Tortoriello, Jaime (Planta Medica, 2007)