US Researchers Shed Light on Mechanism for Anxietyhttp://articles.mercola.com/sites/articles/archive/2002/04/17/anxiety-part-one.aspxHow Common Are Anxiety Disorders? Anxiety disorders are the most common mental illnesses in America: more than 19 million are affected by these debilitating illnesses each year. Anxiety disorders cost the U.S. $46.6 billion in 1990 in direct and indirectenCommunityServer 2008.5 SP1 (Build: 31106.3070)