[Zhang, Wei] Huazhong Univ Sci & Technol, Sch Med & Hlth Management, Tongji Med Coll, Wuhan, Hubei, Peoples R China.
[He, Dong] Guizhou Hosp, Hosp Med Records Dept, Beijing Jishuitan Hosp, Beijing, Peoples R China.
[Wang, Ge] Cent China Normal Univ, Sch Publ Adm, Wuhan, Hubei, Peoples R China.
[Zhu, Chengyan] Wuhan Univ, Sch Polit Sci & Publ Adm, Wuhan, Peoples R China.
[Evans, Richard] Dalhousie Univ, Fac Comp Sci, Halifax, NS, Canada.