Problem Management Plus (PM+) in the management of common mental disorders in a specialized mental healthcare facility in Pakistan; study protocol for a randomized controlled trial

Background The World Health Organization (WHO) has developed Problem ManagementPlus (PM+), a 5-session, psychological intervention programdelivered by trained non-specialist that addresses common mental disorders. The objectives of this study are to evaluate effectiveness and cost-effectiveness of PM+ in a specialized mental health care facility in Pakistan.