[1] Hunan Univ Med, Gen Hosp, Dept Pediat, Huaihua, Hunan, Peoples R China
[2] Jiamusi Univ, Affiliated Hosp 1, Dept Pediat, Jiamusi, Heilongjiang, Peoples R China
[3] LanZhou Univ, Lanzhou, Gansu, Peoples R China
[4] Chongqing Med Univ, Bishan Hosp, Bishan Hosp Chongqing, Dept Pediat, Chongqing, Peoples R China
[5] Chongqing Med Univ, Bishan Hosp, Bishan Hosp Chongqing, Dept Pediat, Chongqing 402760, Peoples R China