1. Henan Key Laboratory of Helicobacter pylori & Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, The Fifth Affiliated Hospital of Zhengzhou University , Henan , China
2. Department of Biology and Evolutionary Ecology Laboratories, Brigham Young University (BYU) , Provo, UT , USA
3. BYU Life Science Museum , Provo, UT , USA
4. Department of Nematology, University of California , Riverside, CA , USA