Digestive System Neoplasms

• Kreiskliniken Altötting-Burghausen — Altötting, Germany
• Gesundheitszentrum St. Marien — Amberg, Germany
• Onkologische Gemeinschaftspraxis — Ansbach, Germany
• Krankenhaus Marienwörth — Bad Kreuznach, Germany

• University of Texas MD Anderson Cancer Center — Houston, Texas, United States

• UCLA Division of Cancer and Prevention Research — Los Angeles, California, United States

• Division of Cancer Prevention and Control Research, Univ of California Los Angeles — Los Angeles, California, United States

• VU University Medical Center — Amsterdam, North Holland, Netherlands

• Sun Yat-sen UniversityCancer center — Guangzhou, Guangdong, China

• UCLA Medical Center-The Pfleger Liver Institute — Los Angeles, California, United States
• UC San Diego — San Diego, California, United States
• University of California, San Francisco — San Francisco, California, United States
• University of Colorado — Aurora, Colorado, United States

• Columbia University Medical Center — New York, United States

Not specified

• Columbia University Medical Center — New York, United States