“…Eleven trials examined CBT and the remaining examined MCT ( k = 3), ACT ( k = 2), dialectical behaviour therapy (DBT; k = 1), eye‐movement desensitization and reprocessing (EMDR; k = 1), interpersonal psychotherapy (IPT; k = 1), or social skills training (SST; k = 1). One trial investigated the efficacy of a ‘psychological approach’, which in content appeared to be similar to CBT and was therefore included in the CBT category for subgroup analysis (Hayashi, Yamashina, Igarashi, & Kazamatsuri, ). Seven studies used a group format to deliver treatment, eleven used an individual format, and two used a mixture of both.…”