[1] Shanghai Jiao Tong Univ, Sch Med, Ren Ji Hospistal, Dept Otorhinolaryngol Surg, Shanghai 200127, Peoples R China
[2] Shanghai Jiao Tong Univ, Otorhinolaryngol Inst, Shanghai 200127, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Med, Ren Ji Hosp, Dept Anaesthesia, Shanghai 200127, Peoples R China