“…A substantial number of trials have reported the effectiveness of disorder-specifi c iPT at treating several common mental disorders. For example, more than 10 randomised controlled trials (RCTs) have reported the clinical benefi ts of iPT for clinical and subclinical depression Perini, Titov, & Andrews, 2009;Ruwaard et al, 2009;Titov, Andrews, Davies, et al, 2010), social phobia (Andersson et al, 2006;Berger, Hohl, & Caspar, 2009;Botella et al, 2010;Carlbring et al, 2007;, and panic disorder Klein et al, 2009;Wims, Titov, Andrews, & Choi, 2010). Encouraging evidence has also been found from a smaller but rapidly growing number of RCTs or open trials evaluating iPT for generalised anxiety disorder Robinson et al, 2010;, obsessive compulsive disorder Andersson et al, 2012;Wootton et al, 2011), and post-traumatic stress disorder (Klein et al, 2010;Spence et al, 2011).…”