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Lanzhou Univ, Evidence Based Social Sci Res Ctr, Sch Publ Hlth, Lanzhou 730000, Peoples R China
Key Lab Evidence Based Med & Knowledge Translat G, Lanzhou 730000, Peoples R China
Gansu Prov Peoples Hosp, Inst Clin Res & Evidence Based Med, Lanzhou 730000, Peoples R China
Lanzhou Univ, Evidence Based Med Ctr, Sch Basic Med Sci, Lanzhou 730000, Peoples R China Lanzhou Univ, Evidence Based Social Sci Res Ctr, Sch Publ Hlth, Lanzhou 730000, Peoples R China