[1] Guangxi Med Univ, Sch Informat & Management, 22 Shuangyong Rd, Nanning 530021, Guangxi, Peoples R China
[2] Guangxi Med Coll, 8 Kunlun Rd, Nanning 530000, Guangxi, Peoples R China
[3] Guangxi Med Univ, Affiliated Hosp Stomatol, Qual Management Dept, 10 Shuangyong Rd, Nanning 530021, Guangxi, Peoples R China
[4] Maternal & Child Hlth Care Hosp Guangxi Zhuang Aut, 225 Xinyang Rd, Nanning 530002, Guangxi, Peoples R China