Screening for periodontal diseases using salivary lactate dehydrogenase, hemoglobin level, and statistical modeling oleh Yoshiaki Nomura, Yoh Tamaki, Akiko Eto, Erika Kakuta, Daisuke Ogino, Yuichi Nakamura, Naoki Takahashi, Fumihiko Hino, Keizo Koresawa, Nobuhiro Hanada, Keita Shimizu