Association between dental caries and Helicobacter pylori infection in Japanese adults: A cross-sectional study. - Iwai, Komei; Azuma, Tetsuji; Yonenaga, Takatoshi; Watanabe, Kazutoshi; Obora, Akihiro; Deguchi, Fumiko; Kojima, Takao; Tomofuji, Takaaki (PLoS ONE, 2022)