Gastrointestinal Diseases

• Indiana University School of Medicine, Department of Pathology and Laboratory Medicine, — Indianapolis, Indiana, United States
• Boston Medical Center, Renal Division — Boston, Massachusetts, United States
• Mayo Clinic — Rochester, Minnesota, United States
• Mount Sinai Medical Center — New York, United States

• East Bay AIDS Ctr — Berkeley, California, United States
• Los Angeles County - USC Med Ctr — Los Angeles, California, United States
• UCSD — San Diego, California, United States
• UCSF - San Francisco Gen Hosp — San Francisco, California, United States

• GSK Investigational Site — Miami, Florida, United States
• GSK Investigational Site — Chicago, Illinois, United States
• GSK Investigational Site — Boston, Massachusetts, United States
• GSK Investigational Site — St Louis, Missouri, United States

• Atrium Health/Wake Forest University School of Medicine — Winston-Salem, North Carolina, United States

• The First Affiliated Hospital of Zhengzhou University — Zhengzhou, Henan, China

• Grand Beach — Winnipeg, Manitoba, Canada
• Shubenacadie Canal — Halifax, Nova Scotia, Canada
• Kinsmen beach — Port Perry, Ontario, Canada
• Colchester Beach — Windsor, Ontario, Canada

• English Bay Beach and Kitsilano Beach — Vancouver, British Columbia, Canada
• Grand Beach — Winnipeg, Manitoba, Canada
• Birch Cove Beach — Halifax, Nova Scotia, Canada
• Bay Beach and Nickel Beach — Fort Erie, Ontario, Canada

• Singapore Institute for Clinical Trials — Singapore

Not specified