Ishikawa I, Nakashima K, Koseki T, Nagasawa T, Watanabe H, Arakawa S, Nitta H, Nishihara T
Department of Periodontology, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.
Periodontol 2000. 1997 Jun;14:79-111. doi: 10.1111/j.1600-0757.1997.tb00193.x.