[1] Shanghai Jiao Tong Univ, Shanghai Peoples Hosp 9, Coll Stomatol, Natl Ctr Stomatol,Dept Oral Surg,Sch Med,Shanghai, Shanghai, Peoples R China
[2] China Med Univ Sch & Hosp Stomatol, Dept Oral & Maxillofacial Surg, Shenyang 110002, Liaoning, Peoples R China
[3] Chongqing Med Univ, Dept Nursing, Affiliated Hosp 1, Chongqing 400016, Peoples R China
[4] Anhui Med Univ, Dept Stomatol, Affiliated Hosp 2, Hefei 230601, Anhui, Peoples R China