[1] Minist Educ, Key Lab Diagnost Med, Beijing, Peoples R China
[2] Dept Clin Biochem, Chongqing, Peoples R China
[3] Chongqing Med Univ, Coll Lab Med, Chongqing, Peoples R China
[4] Chongqing Med Univ, Affiliated Hosp 2, Dept Endocrinol, Chongqing, Peoples R China