1. a New England Research Institutes, Inc. , Watertown, Massachusetts, USA
2. b Institute for Behavioral Health/Heller School , Brandeis University , Massachusetts, USA
3. c Center for Addictions Research and Services , Boston University School of Social Work , Boston, Massachusetts, USA
4. d Synergy Enterprises , Cranston, Rhode Island, USA
5. e Boston University School of Social Work , Boston, Massachusetts, USA
6. f New England Growth Associates , Watertown, Massachusetts, USA