Zhengzhou Univ;
Affiliated Hosp 2;
Dept Gastroenterol;
Zhengzhou 450014;
Henan Province;
Peoples R China;
McMaster Univ;
Dept Pathol & Mol Med;
Hamilton;
ON L8N 4A6;
Canada;
Multidrug efflux pump; Helicobacter pylori; Multidrug resistance; Proton pump inhibitor; Real-time polymerase chain reaction;