Zhou X, Zhu H, Zhu C, Lin K, et al. Helicobacter pylori Infection and Serum Pepsinogen Level With the Risk of Gastric
Precancerous Conditions: A Cross-sectional Study of High-risk Gastric Cancer
Population in China. J Clin Gastroenterol 2020 Oct 27. doi: 10.1097/MCG.0000000000001444.
PMID: 33116065