1. From the Department of Otolaryngology-Head and Neck Surgery (Dr Weaver) Sleep Disorders Center (Dr Weaver), Seattle
2. From the Center for Cost and Outcomes Research (Dr Weaver), University of Washington, Seattle, WA
3. From the Department of Otolaryngology and Communication Sciences (Dr Woodson) and Sleep Disorders Program (Dr Woodson), Medical College of Wisconsin, Milwaukee, WI
4. From the Department of Otolaryngology-Head and Neck Surgery (Dr Steward), University of Cincinnati, Cincinnati, OH.