Nasal Polyps

• The First Affiliated Hospital of Wannan Medical College — Wuhu, Anhui, China
• ZhuJiang Hospital of Southern Medical University — Guangzhou, Guangdong, China
• Jieyang People's Hospital — Jieyang, Guangdong, China
• The Fifth Affiliated Hospital Sun Yat-sen University — Zhuhai, Guangdong, China

• Department of Otorhinolaryngology, Helsinki University Hospital — Helsinki, Finland
• Kuopio University Hospital — Kuopio, Finland
• Academic Medical Center — Amsterdam, Netherlands

• Centre Hospitalier Intercommunal de Créteil — Créteil, France
• Hôpital Henri Mondor — Créteil, France
• Hôpital kremlin Bicêtre — Le Kremlin-Bicêtre, France
• CHU Liile — Lille, France

• Humanitas Clinical and Research Hospital — Rozzano, MI, Italy

Not specified

• Assiut University Hospital — Asyut, Egypt

• Johns Hopkins Bayview Medical Center — Baltimore, Maryland, United States
• Johns Hopkins Hospital — Baltimore, Maryland, United States

Not specified

Not specified

• Recep Tayyip Erdogan University — Rize, Eastern Blacksea, Turkey (Türkiye)