Hoarseness

• Fujian Medical University Union Hospital — Fuzhou, Fujian, China
• Mengchao Hepatobiliary Hospital of Fujian Medical University — Fuzhou, Fujian, China
• The Second Affiliated Hospital of Fujian Medical University — Quanzhou, Fujian, China
• The First Affiliated Hospital of Nanchang University — Nanchang, Jiangxi, China

• Ankara Etlik City Hospital — Ankara, Yenimahalle, Turkey (Türkiye)

• Saint Petersburg State University Hospital — Saint Petersburg, Russia

• he First Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China
• The First Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China

• Department of Otorhinolaryngology, Head and Neck Surgery, United Christian Hospital and Tseung Kwan O Hospital — Hong Kong

Not specified

• Izmir Katip Celebi University Atatürk Training and Research Hospital — Izmir, Karabaglar, Turkey (Türkiye)

• Kyungpook National University Chilgok Hospital — Daegu, South Korea

• University of Utah — Salt Lake City, Utah, United States

• Maharaj Nakorn Chiang Mai Hospital, Faculty of Medicine, Chiang Mai University — Chiang Mai, Mueang, Thailand