Since this article’s publication, the authors have discovered and reported a minor error after analysis of follow-up data relating to one participant’s post-treatment Montgomery–Åsberg Depression Rating Scale (MADRS) score.

The error does not affect the reported number of responders or remitters or the MADRS scores among the nine participants without comorbid post-traumatic stress disorder. The error does not alter any of the study’s interpretation of the results, or the conclusions.

The corrected table is below:

Table 2 Overall summary of primary, secondary and selected exploratory efficacy outcomes

MADRS, Montgomery–Asberg Depression rating scale; SDS, Sheehan Disability Scale; BDI-II, Beck’s Depression Inventory-II; GAD-7, Generalised Anxiety Disorder-7; PCL-5, the Post-Traumatic Stress Disorder Checklist for DSM-5; BIS, Bergen Insomnia Scale; AUDIT, Alcohol Use Disorders Identification Test; DUDIT, Drug Use Disorder Identification Test.

a. All outcomes are exploratory unless otherwise noted.

b. Visit 3 (V3) for MADRS and SDS, screening for AUDIT and DUDIT and V4 for other outcome measures.

c. V13 for MADRS and SDS, V14 for other outcome measures.

The same corrected values should also be applied to the ‘Primary outcome’ section of the paper, on page 785.