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Interestingly, on Monday a preprint [1] was posted calling into question a major Nature paper from 2020 that associated the microbiome with multiple cancer types [2] (though within each tissue sample, not the gut).

[1] https://www.biorxiv.org/content/10.1101/2023.07.28.550993v1 [2] https://www.nature.com/articles/s41586-020-2095-1