1. Robert Wood Johnson Foundation Clinical Scholars, University of Michigan, Ann Arbor, Michigan.
2. Department of Otolaryngology–Head & Neck Surgery, University of Michigan, Ann Arbor, Michigan.
3. VA Center for Clinical Management Research, Veterans' Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan.
4. Department of Pediatrics & Communicable Diseases, University of Michigan, Ann Arbor, Michigan.
5. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.
6. Gerald R. Ford School of Public Policy, University of Michigan, Ann Arbor, Michigan.