Advanced Adenoma

• Sun Yat-sen University Cancer Center — Guandong, China
• Maoming People's Hospital — Guangdong, China
• The Fourth Hospital of Hebei Medical University — Hebei, China
• Nanjing Medical University — Nanjing, China

• Inner Mongolia People's Hospital — Hohhot, Inner Mongolia, China
• Prince of Wales Hospital — Hong Kong

• Prince of Wales Hospital — Shatin, New Territories, Hong Kong

• The Second Affiliated Hospital of Zhejiang University — Hangzhou, Zhejiang, China
• Sun Yat-Sen University Cancer Hospital — Guangzhou, China
• Yunnan cancer hospital — Kunming, China
• Jiangsu province hospital — Nanjing, China

Not specified

• Second Affiliated Hospital, School of Medicine, Zhejiang University — Hangzhou, Zhejiang, China

• Departments of Gastroenterology and Clinical Laboratory, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine — Shanghai, China

• Changhai Hospital — Shanghai, Shanghai Municipality, China

• The First Affiliated Hospital of Zhengzhou University — Zhengzhou, Henan, China
• Hubei Cancer Hospital — Wuhan, Hubei, China
• The First Affiliated Hospital with Nanjing Medical University — Nanjing, Jiangsu, China
• Fudan University Shanghai Cancer Center — Shanghai, Shanghai Municipality, China