Sleep Apnea, Obstructive

• Alabama Sleep Clinic — Huntsville, Alabama, United States
• IV Care & Respiratory — Belleville, Illinois, United States
• SleepMed of South Carolina — Columbia, South Carolina, United States

• VA Boston Healthcare System Jamaica Plain Campus, Jamaica Plain, MA — Boston, Massachusetts, United States

• Marmara University — Istanbul, Pendik, Turkey (Türkiye)

• Erasme Hospital — Brussels, Belgium

• Grantham Hospital — Hong Kong
• Prince of Wales Hospital — Hong Kong
• Queen Mary Hospital — Hong Kong

• Cincinnati Children's Hospital Medical Center — Cincinnati, Ohio, United States

• The Ohio State University Martha Morehouse Medical Pavilion 2050 Kenny Rd;Ste 2600 — Columbus, Ohio, United States

• CHUV (Centre Hospitalier Universitaire Vaudois) — Lausanne, Canton of Vaud, Switzerland

Not specified

• Medisch Centrum Leeuwarden — Leeuwarden, Provincie Friesland, Netherlands
• University Medical Center Groningen — Groningen, Netherlands
• Martini Ziekenhuis Groningen — Groningen, Netherlands