Recurrent Nasopharyngeal Carcinoma

• Kaiser Permanente Dublin — Dublin, California, United States
• Kaiser Permanente-Fremont — Fremont, California, United States
• Kaiser Permanente Fresno Orchard Plaza — Fresno, California, United States
• Kaiser Permanente-Fresno — Fresno, California, United States

• Sun Yat-sen University Cancer Center — Guangzhou, Guangdong, China
• The Fifth Affiliated Hospital of Sun Yat-sen University — Zhuhai, Guangdong, China
• The Nanchang Affiliated Hospital, Sun Yat-Sen University (Nanchang First Hospital) — Nanchang, Jiangxi, China

• Sun Yat-sen University Cancer Center — Guangzhou, Guangdong, China
• Peking University Third Hospital — Beijing, China
• Sichuan Cancer Hospital — Chengdu, China
• Fujian Province Cancer Hospital — Fuzhou, China

• Guangzhou Concord Cancer Center — Guangzhou, Guangdong, China
• Guangzhou concord cancer center — Guanzhou, Guangzhou, China

• Eye& ENT Hospital, Fudan University — Shanghai, Shanghai Municipality, China
• Fujian Medical University Union Hospital — Fuzhou, China
• The People's Hospital of Guangxi Zhuang Autonomous Region — Nanning, China
• Changhai Hospital — Shanghai, China

• Eye& ENT Hospital, Fudan University — Shanghai, Shanghai Municipality, China
• Fujian Medical University Union Hospital — Fuzhou, China
• The People's Hospital of Guangxi Zhuang Autonomous Region — Nanning, China
• Changhai Hospital — Shanghai, China

• Guangxi Medical University Cancer Hospital — Nanning, Guangxi, China

• Singapore General Hospital — Singapore

Not specified

• Fujian Medical University Union Hospital — Fuzhou, Fujian, China
• The First Affiliated Hospital of Nanchang University — Nanchang, Jiangxi, China
• Fudan University Shanghai cancer center — Shanghai, Shanghai Municipality, China