1. Center for Health Policy and Health Services Research, Henry Ford Health System, Detroit, MI, USA
2. Rhode Island Hospital, Providence, RI, USA
3. Prevention Research Center, Pacific Institute for Research and Evaluation, Oakland, CA, USA
4. The Miriam Hospital, Providence, RI, USA
5. University of Michigan, Ann Arbor, MI, USA
6. Oregon Social Learning Center, Eugene, OR, USA
7. Decision Sciences Institute, Pacific Institute for Research and Evaluation, Pawtucket, RI, USA