[1] Peking Univ Sch & Hosp Stomatol, Natl Ctr Stomatol, Dept Oral & Maxillofacial Surg, Postanesthesia Care Unit, Beijing 100081, Peoples R China
[2] Natl Ctr Stomatol, Beijing 100081, Peoples R China
[3] Natl Clin Res Ctr Oral Dis, Beijing 100081, Peoples R China
[4] Natl Engn Res Ctr Oral Biomat & Digital Med Device, Beijing 100081, Peoples R China
[5] Peking Univ, Sch Nursing, Teaching Off, Beijing 100191, Peoples R China
[6] 22,Zhongguancun South Ave,Haidian Dist, Beijing 100081, Peoples R China