Erik Hedman studied internet-delivered cognitive behavioral therapy for severe health anxiety. A randomized trial compared therapist-guided internet treatment with an attention-control condition. The comparison tests that delivery arrangement and treatment package, rather than showing that an online format alone is sufficient or that every form of health concern has the same mechanism. [ref]
Internet-based cognitive-behavioural therapy for severe health anxiety: randomised controlled trial by Erik Hedman and others. 2011, randomized therapist-guided internet-CBT comparison
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