Procedures
psychiatric disorders
Procedures for being admitted into the trial included an initial telephone screening, consecutive self-reported baseline assessments every 7 days for 4 weeks, and a face-to-face assessment at the clinic. During the face-to-face assessment, a psychologist or psychotherapist administered semi-structured interviews to assess for NSSID and other co-occurring psychiatric disorders (eMethods in Eligible participants were randomly allocated without stratification to IERITA plus TAU or TAU only. The random allocation sequence was based on a true random number service (Random.org) and conducted by an independent researcher in blocks of 4 or 6 per treatment clinic and placed in opaque sealed envelopes. Outcome measures included masked clinician-rated interviews (via telephone) and self-reported measures (via online platform). Psychologists and psychotherapists masked to treatment allocation and independent from the scientific team conducted the clinician-rated follow-up assessments. Details on masking and participant reimbursement are available in eMethods in 