[1] China Med Univ, Shengjing Hosp, Dept Clin Epidemiol, Shenyang, Peoples R China
[2] China Med Univ, Shengjing Hosp, Clin Res Ctr, Shenyang, Peoples R China
[3] China Med Univ, Shengjing Hosp, Dept Pediat, Shenyang, Peoples R China
[4] Fudan Univ, Shanghai Peoples Hosp 5, Dept Endocrinol, Shanghai, Peoples R China