[1] Anhui Med Univ, Sch Publ Hlth, Dept Epidemiol & Hlth Stat, 81 Meishan Rd, Hefei 230032, Anhui, Peoples R China
[2] Anhui Med Univ, Dept Hosp Infect Prevent & Control, Childrens Hosp, Hefei, Anhui, Peoples R China
[3] Maanshan Ctr Dis Control & Prevent, Dept Chron Dis Prevent & Hlth Management, Maanshan, Anhui, Peoples R China
[4] Changfeng Cty Ctr Dis Control & Prevent, Dept AIDS Prevent & Control, Hefei, Anhui, Peoples R China
[5] Fuyang Ctr Dis Control & Prevent, Fuyang, Anhui, Peoples R China
[6] Anhui Med Univ, Chaohu Hosp, Hefei, Anhui, Peoples R China
[7] Anhui Med Univ, Ctr Evidence Based Practice, Hefei, Anhui, Peoples R China