Internet CBTI is a cost-effective treatment compared to group CBTI for adolescents, although effects were largely similar for both formats. Further studies in a clinical setting are warranted. < /p > < /div > < div class="section" > < a name="d7e126" > < !-- named anchor -- > < /a > < h3 class="section-title" > Clinical Trial Registration: < /h3 > < p id="d7e..."> Internet CBTI is a cost-effective treatment compared to group CBTI for adolescents, although effects were largely similar for both formats. Further studies in a clinical setting are warranted. < /p > < /div > < div class="section" > < a name="d7e126" > < !-- named anchor -- > < /a > < h3 class="section-title" > Clinical Trial Registration: < /h3 > < p id="d7e..." /> Internet CBTI is a cost-effective treatment compared to group CBTI for adolescents, although effects were largely similar for both formats. Further studies in a clinical setting are warranted. < /p > < /div > < div class="section" > < a name="d7e126" > < !-- named anchor -- > < /a > < h3 class="section-title" > Clinical Trial Registration: < /h3 > < p id="d7e..." />