1. Recovery Research Institute, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA;
2. Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA;
3. Massachusetts General Hospital, Center for Anxiety and Traumatic Stress Disorders, Boston, Massachusetts, USA;
4. Boston University School of Public Health, Boston, Massachusetts, USA;
5. Department of Prevention and Community Health, Milken Institute School of Public Health, George Washington University, Washington, DC, USA