Polyps of Colon

• Shenzhen Hospital of Southern Medical University — Shenzhen, Guangdong, China
• Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen Center — Shenzhen, Guangdong, China
• The First Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China

• University College London Hospitals NHS Foundation Trust — London, United Kingdom

• Department of Gastroenterolog, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine — Shanghai, Shanghai Municipality, China

• Fondazione Poliambulanza Istituto Ospedaliero — Brescia, Italy

• Universitätsklinikum Würzburg — Würzburg, Bavaria, Germany

• Centre Hospitalier Universitaire de Montréal (CHUM) — Montreal, Quebec, Canada

• Radboud University hospital — Nijmegen, Gelderland, Netherlands

Not specified