Foothills Medical Centre, Calgary, Alberta, Canada
Liver and Intestinal Research Centre, Vancouver, British Columbia, Canada
Ottawa Hospital; General Campus, Ottawa, Ontario, Canada
Call for Information, Call for Information, United Kingdom
Call For Information, Call For Information, Germany
Fox Chase/ Temple Cancer Center, Philadelphia, Pennsylvania, United States
South Denver Gastroenterology, Englewood, Colorado, United States
Call for Information, New York, New York, United States
George Washington University, Washington, District of Columbia, United States
Arizona Clinical Research Center, Tucson, Arizona, United States
Ohio State University, James Cancer Hospital Comprehensive Cancer Center, Columbus, Ohio, United States
Call for information, Santurce, Puerto Rico
Call for information, Amsterdam, Netherlands
Dniepropetrovsk State Medical Academy, Dniepropetrovsk, Ukraine
Zaporizhya Medical Institute, Zaporizhya, Ukraine
MBAL "Stara Zagora" EAD, Stara Zagora, Bulgaria
David N. Schwartz, M.D., Attleboro, Massachusetts, United States
Lawrence D. Wruble, M.D., Memphis, Tennessee, United States
Lawton Shick, M.D., Worcester, Massachusetts, United States
Dana-Farber Cancer Institute, Boston, Massachusetts, United States
Fox Chase Cancer Center, Philadelphia, Pennsylvania, United States
Duke Comprehensive Cancer Center, Durham, North Carolina, United States