[1] Peking Univ, Sch & Hosp Stomatol, Dept Oral & Maxillofacial Surg, Beijing, Peoples R China
[2] Natl Ctr Stomatol, Beijing, Peoples R China
[3] Natl Clin Res Ctr Oral Dis, Beijing, Peoples R China
[4] Peking Univ, Sch & Hosp Stomatol, Cent Lab, Beijing, Peoples R China
[5] Army Med Univ, Xinqiao Hosp, Affiliated Hosp 2, Dept Stomatol, Chongqing, Peoples R China