Obstructive Sleep Apnea

• Leonard Davis Institute of Health Economics — Philadelphia, Pennsylvania, United States
• VA Pittsburgh Healthcare System — Pittsburgh, Pennsylvania, United States

• Northwestern University — Chicago, Illinois, United States

• Dartmouth-Hitchcock Medical Center — Lebanon, New Hampshire, United States

Not specified

• Center for Sleep and Vigilance Disorders — Gothenburg, Västra Götaland County, Sweden

• SUNY Downstate Medical Center — Brooklyn, New York, United States

• Johns Hopkins University — Baltimore, Maryland, United States
• Cleveland Clinic Foundation — Cleveland, Ohio, United States

• Hackensack University Medical Center — Hackensack, New Jersey, United States

• Sleep Institute of Itaperuna — Itaperuna, Rio de Janeiro, Brazil

• University of Alabama at Birmingham — Birmingham, Alabama, United States