Findings of BDNF protein levels in anxiety disorders, in animal models (Chen et al., 2006; Govindarajan et al., 2006; Monteggia et al., 2007) and in humans (Maina et al., 2010; Molendijk et al., 2011b; Wang et al., 2011) have, however, been inconsistent. The gene discussed is BDNF; the disease is anxiety disorder.