[1] Third Peoples Hosp Bengbu, Dept Gen Dent, Bengbu, Anhui, Peoples R China
[2] Shanghai Jiao Tong Univ, Shanghai Peoples Hosp 9, Dept Gen Dent, Sch Med, Shanghai, Peoples R China
[3] Shanghai Jiao Tong Univ, Coll Stomatol, Shanghai, Peoples R China
[4] Natl Clin Res Ctr Oral Dis, Natl Ctr Stomatol, Shanghai, Peoples R China
[5] Shanghai Key Lab Stomatol, Shanghai, Peoples R China
[6] Bengbu Med Coll, Dept Stomatol, Affiliated Hosp 1, Bengbu, Anhui, Peoples R China
[7] Community Hlth Serv Ctr Huajing Town, Shanghai, Peoples R China