Colorectal Polyps

• Hospital Universitario de la Santa Creu i Sant Pau — Barcelona, Spain
• Hospital Althaia — Manresa, Barcelona, Spain
• Hospital Universitario Basurto — Bilbao, Bizkaia, Spain
• Hospital de Cruces — Bilbao, Bizkaia, Spain

• Clinique Paris-Bercy — Charenton-le-Pont, Val de Marne, France

• Catharina Ziekenhuis — Eindhoven, North Brabant, Netherlands
• LUMC — Leiden, South Holland, Netherlands
• Erasmus MC — Rotterdam, South Holland, Netherlands

• Peking Union Medical College Hospital — Beijing, China

• Renji Hospital, Shanghai Jiao-Tong University School of Medicine — Shanghai, China

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

• The First Hospital of Lanzhou University — Lanzhou, Gansu, China

• Nantong First People's Hospital — Nantong, Jiangsu, China
• Wuxi Ninth People's Hospital — Wuxi, Jiangsu, China

• Qilu Hospital of Shandong University — Jinan, Shandong, China

Not specified