[1] Weifang Peoples Hosp, Emergency Dept, Weifang, Peoples R China
[2] Qingdao Municipal Hosp, Dept Stomatol, Qingdao, Peoples R China
[3] Qingdao Univ, Qingdao Cent Hosp, Dept Clin Lab, Qingdao, Peoples R China
[4] Peoples Hosp Zhangqiu Area, Dept Endoscop Room, Jinan, Peoples R China
[5] Weifang Peoples Hosp, Dept Clin Lab, Weifang, Peoples R China
[6] Qingdao Univ, Qingdao Cent Hosp, Dept Stomatol, 127 Siliu South Rd, Qingdao 266042, Shandong, Peoples R China