Therapists were not involved in assessments. To keep the assessors blind, therapists instructed patients not to talk about their treatment during assessments. Only in cases of SAEs would assessors and therapists share information on the clinical status of the patient, but not the treatment strategies. The assessors filled in a blindness protocol for unintended unblindings after each contact with the patient. An unblinding was documented in 6 of 99 CBT cases and in 9 of 99 CR cases (6.1% in CBTvs. 9.1% in CR; Fisher exact test, p = 0.593).