[1] Ningxia Med Univ, Dept Pediat, Gen Hosp, Yinchuan, Ningxia, Peoples R China
[2] Fujian Med Univ, Dept Endocrinol, Affiliated Hosp 2, Quanzhou, Peoples R China
[3] Qingdao Fuwai Cardiovasc Hosp, Dept Gen Internal Med, Qingdao, Peoples R China
[4] Longgang Dist Matern & Child Healthcare Hosp, Dept Pediat, Shenzhen, Peoples R China
[5] Chongqing Jiangbei Hosp Tradit Chinese Med, Dept Pediat, Chongqing, Peoples R China
[6] Longgang Dist Matern & Child Healthcare Hosp, Dept Child Healthcare, Shenzhen, Peoples R China