In Mueller's study, referrals to MSF in the Mindanao region of the Philippines were tracked, with 96% of those treated for emotional distress reporting a traumatic event, ( 54% home evacuation, 26% conflict, 5% destruction of property).  The patients were tracked throughout brief psychotherapy sessions, and the results showed a marked improvement (via their scores on a self-reporting questionnaire). What are the implications of this study? 