Tracheal Stenosis

• Department of Anesthesiology and Pain Medicine , Anesthesia and Pain Research Institute, Yonsei University College of Medicine — Seoul, South Korea

• Ankara City Hospital — Çankaya, Ankara, Turkey (Türkiye)

• Ankara Atatürk Sanatorium Training and Research Hospital — Ankara, Keçiören, Turkey (Türkiye)

• Dessie comprehensive specilized hospital — Dessie, Amhara, Ethiopia

• Istanbul University, Department of Anesthesiology — Istanbul, Turkey (Türkiye)

• Scripps Green Hosptial — La Jolla, California, United States
• University of Colorado Denver — Denver, Colorado, United States
• Borland-Groover Clinic — Jacksonville, Florida, United States
• Ochsner Medical Center — Kenner, Louisiana, United States

Not specified

• Assistance Publique Hôpitaux de Paris, Hôpital Avicenne, CHU Paris-Seine-Saint-Denis — Bobigny, Seine-Saint-Denis, France

• The Republican Center for Research and Practice in Otolaryngology — Minsk, Belarus
• The Republican Research and Practical Center for Epidemiology and Microbiology — Minsk, Belarus

• Groote Schuur Hospital — Cape Town, Western Cape, South Africa