Airway Obstruction

• Alaska Clinical Research Center, LLC — Anchorage, Alaska, United States
• Urology Assoc Medical Group — Burbank, California, United States
• South Orange County Med Research Center — Laguna Hills, California, United States
• San Diego Sexual Medicine — San Diego, California, United States

• Baylor University Medical Center (BUMC) — Dallas, Texas, United States
• Southern Methodist University (SMU) — Dallas, Texas, United States

• Pedro Charco Mora — Valencia, Spain
• Pedro Charco-Mora — Valencia, Spain

• Centre of Competence for Oro- and Craniofacial Malformations and Department of Neonatology, Univ. Hospital of Cologne — Cologne, Germany
• Dept. of Neonatology and Interdisciplinary Centre for Craniofacial Malformations, University Hospital Tuebingen — Tübingen, Germany
• Dept. of Orthodontics and University Children's Hospital, University Hospital of Wuerzburg — Würzburg, Germany

• Pedro Charco Mora — Valencia, Spain

• Massachusetts General Hospital — Boston, Massachusetts, United States

• Massachusetts General Hospital — Boston, Massachusetts, United States

Not specified

• HEMS VGR — Gothenburg, VästraGötaland, Sweden

• Department of Anesthesiology, Taipei Veterans General Hospital — Taipei, Taiwan