Barry Marshall

J. Y. Park et al., Global lifetime estimates of expected and preventable gastric cancers across 185 countries. Nat. Med. 31, 3020–3027 (2025). Y. Duan et al., Helicobacter pylori and gastric cancer: Mechanisms and new perspectives. J. Hematol. Oncol. 18, 10 (2025). M. Amieva, R. M. Peek Jr., Pathobiology of Helicobacter pylori-induced gastric cancer. Gastroenterology 150, 64–78 (2016). J. Xi et al., Dynamic variations of the gastric microbiota: Key therapeutic points in the reversal of Correa’s cascade. Int. J.

Abstract The presence of microbiota in human tumors has been reported widely based on bioinformatic analyses of DNA sequencing datasets; however, the source of microbial sequences in atypical anatomical sites is challenging to validate, as these could derive from sampling, storage, handling and processing of samples, similar to what has been described in studies of ancient DNA.