[1] Hebei Med Univ, Dept Internal Med, Shijiazhuang 050017, Hebei, Peoples R China
[2] Hebei Gen Hosp, Dept Endocrinol, Shijiazhuang 050051, Hebei, Peoples R China
[3] Hebei Med Univ, Dept Endocrinol, Second Hosp, Shijiazhuang 050000, Hebei, Peoples R China
[4] Hebei Gen Hosp, Hebei Key Lab Metab Dis, Shijiazhuang 050051, Hebei, Peoples R China