[1] Lanzhou Univ, Evidence Based Social Sci Res Ctr, Lanzhou, Peoples R China
[2] Lanzhou Univ, Sch Publ Hlth, Dept Hlth Policy & Management, Lanzhou, Peoples R China
[3] Key Lab Evidence Based Med Gansu Prov, Lanzhou, Peoples R China
[4] Lanzhou Univ, Sch Nursing, Evidence Based Nursing Res Ctr, Lanzhou, Peoples R China
[5] Lanzhou Univ, Clin Sch Med 1, Lanzhou, Peoples R China
[6] Gansu Prov Matern & Child Care Hosp, Dept Pediat, Lanzhou, Peoples R China
[7] Gansu Prov Hosp, Dept Endocrinol, Lanzhou, Peoples R China
[8] Lanzhou Univ, Hosp 1, Dept Endocrinol, Lanzhou, Peoples R China