Participants suffering from at least @ DSM-IV or ICD-@ classified phobia ( social phobia , agoraphobia with or without panic disorder , and/or specific phobia as ascertained by a telephone interview at baseline ) were randomly allocated to either a @-week Internet-based guided self-help program based on exposure therapy with weekly student support followed by face-to-face psychotherapy ( n = @ ) or a wait-list control group followed by face-to-face psychotherapy ( n = @ ) .