Otitis Media with Effusion

• Antwerp University Hospital — Edegem, Antwerp, Belgium

• VA Portland Health Care System, Portland, OR — Portland, Oregon, United States
• Mountain Home VA Medical Center James H. Quillen VA Medical Center, Mountain Home, TN — Mountain Home, Tennessee, United States

• Lumbini Medical College — Tānsen, Palpa, Nepal

• Antwerp University Hospital — Edegem, Antwerp, Belgium

• Sacramento ENT — Roseville, California, United States
• Camino ENT — San Jose, California, United States
• Advanced ENT and Allergy — Louisville, Kentucky, United States
• Charlotte Eye Ear Nose and Throat Associates — Charlotte, North Carolina, United States

• Bezmialem Vakif University — Istanbul, Fatih, Turkey (Türkiye)

Not specified

• Uhmontpellier — Montpellier, France

• Children Hospital of Patras "Karamandaneio" — Pátrai, Achaia, Greece
• Patras University Hospital — Rio, Achaia, Greece

• St. Louis Children's Hospital — St Louis, Missouri, United States