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Sleep duration and severe periodontitis in middle-aged Japanese workers |
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| Authors: | Masanori Iwasaki Michihiko Usui Wataru Ariyoshi Keisuke Nakashima Yoshie Nagai-Yoshioka Maki Inoue Kaoru Kobayashi Tatsuji Nishihara |
| Abstract: | |
| Keywords: | cross-sectional studies epidemiology oral health periodontal diseases sleep deprivation |