Institute of Cancer;
the Cancer Hospital of Hubei Province;
Wuhan 430079;
Hubei Province;
China;
Department of Pathology;
Creighton University Medical Center;
30^th Street;
Omaha NE 68131;
United States;
Department of Gastroenterology;
the First Affiliated Hospital of Sun Yat-Sen University of Medical Science;
Guangzhou 510080;
Guangdong Province;
China;