Signs and Symptoms, Digestive

• Azienda Ospedaliera Universitaria Federico II — Naples, Italy
• Policlinico Tor Vergata Hospital — Rome, Italy
• Istituto Superiore di Sanità — Rome, Italy

• Montefiore Medical Center — The Bronx, New York, United States

• Baylor College of Medicine / Texas Children's Hospital — Houston, Texas, United States

• Henan cacer hospital — Henan, China
• Henan cancer hospital — Zhengzhou, Henan, China

• A2Z Clinical Centro Avancado de Pesquisa Clinica Eireli — Valinhos, São Paulo, Brazil

Not specified

• Curebase, Inc. — San Francisco, California, United States

• Universitaire Ziekenhuizen Leuven — Leuven, Flemish Brabant, Belgium
• Cliniques Universitaires St. Luc — Brussels, Belgium
• Huisartspraktijk Jaak Mortelmans — Ham, Belgium
• Centre Hospitalier Universitaire Sart Tilman Liège — Liège, Belgium

• Modesto, California, United States
• Palm Desert, California, United States
• Sacramento, California, United States
• Aurora, Colorado, United States

• Centre of Athlete Training and Health Research — Ankara, Turkey (Türkiye)