Type D personality and periodontal disease in university students: A prospective cohort study. - Mizutani, Shinsuke; Ekuni, Daisuke; Yamane-Takeuchi, Mayu; Azuma, Tetsuji; Taniguchi-Tabata, Ayano; Tomofuji, Takaaki; Iwasaki, Yoshiaki; Morita, Manabu (Journal of Health Psychology, 2018)