[Wen, Jun-Bao; Yang, Shao-Bo] Peoples Liberat Army Gen Hosp, Dept Gastroenterol, Nan Lou Div, Beijing, Peoples R China.
[Yang, Ping-Chang; Li, Tong-Li; Chen, Xiao] McMaster Univ, Dept Pathol & Mol Med, Hamilton, ON L8N 4A6, Canada.
[Li, Tong-Li] Shanxi Prov Peoples Hosp, Dept Otolaryngol, Taiyuan, Peoples R China.
[Zhao, Chang-Qing; An, Yun-Fang] Shanxi Med Univ, Hosp 2, Dept Otolaryngol, Taiyuan, Peoples R China.
[Tian, Dao-Fa] Hunan Chinese Tradit Med Univ, Dept Otolaryngol, Changsha, Hunan, Peoples R China.