“…It is a common disorder: epidemiological studies (Fresco, Erwin, Heimberg, & Turk, 2000;Kessler et al, 1994;Kringlen, Torgersen, & Cramer, 2001) have found lifetime prevalence rates of about 13%. Left untreated, the disorder has a chronic course (DeWit, Ogborne, Offord, & MacDonald, 1999;Keller, 2003), and severely impairs social role functioning and career progression (Wittchen & Fehm, 2003). It also represents an influential risk factor for suicidal behavior (Keller, 2003).…”