[1] Osaka Univ, Grad Sch Dent, Dept Periodontol, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Dent Hosp, Dept Periodontol, Div Oral Biol & Dis Control, Suita, Osaka 5650871, Japan
[3] Kagoshima Univ, Dent Hosp, Dept Periodontol, Kagoshima 890, Japan
[4] Nagasaki Univ Hosp, Attached Sch Dent, Dept Periodontol, Nagasaki, Japan
[5] Med & Dent Hosp, Fukuoka Dent Coll, Dept Odontol, Sect Periodontol, Fukuoka, Japan
[6] Med & Dent Hosp, Fukuoka Dent Coll, Dept Gen Dent, Sect Gen Dent, Fukuoka, Japan
[7] Tokushima Univ Hosp, Dept Periodontol & Endodontol, Tokushima, Japan
[8] Hiroshima Univ Hosp, Dept Periodontal Med, Div Frontier Med Sci, Hiroshima, Japan
[9] Okayama Univ Hosp, Dept Pathophysiol, Okayama, Japan
[10] Niigata Univ, Med & Dent Hosp, Dept Oral Biol Sci, Div Periodontol, Niigata 95021, Japan
[11] Tsurumi Univ, Dent Hosp, Dept Periodont & Endodont, Yokohama, Kanagawa, Japan
[12] Keio Univ Hosp, Dept Dent & Oral Surg, Keio, Japan
[13] Nihon Univ, Sch Dent, Dent Hosp, Dept Periodontol, Tokyo 102, Japan
[14] Tokyo Med & Dent Univ, Univ Hosp, Fac Dent, Sect Periodontol,Dept Hard Tissue Engn, Tokyo, Japan
[15] Chiba Hosp, Tokyo Dent Coll, Dept Periodontol, Chiba, Japan
[16] Tohoku Univ Hosp, Dept Oral Biol, Div Periodontol & Endodontol, Sendai, Miyagi, Japan
[17] Tohoku Univ, Grad Sch Dent, Dept Oral Med & Surg, Div Oral Diag, Sendai, Miyagi 980, Japan
[18] Nagoya Univ, Grad Sch Med, Dept Nephrol, Nagoya, Aichi 4648601, Japan
[19] Izumisano Municipal Hosp, Rinku Gen Med Ctr, Dept Oral & Maxillofacial Surg, Izumisano, Japan