“…Regarding the effectiveness of these online means, in general, studies allow us to conclude that internet interventions may be efficacious and cost-effective [ 6 , 16 , 17 , 19 , 20 , 32 , 33 , 34 , 35 ]. They seemed to be at least as effective as face-to-face interventions in a large group of clients receiving treatment for psychological disorders, namely, for generalized anxiety and other types of anxiety disorders [ 36 , 37 , 38 , 39 , 40 , 41 , 42 ], depression [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ], and stress [ 53 , 54 ].…”