[1]Fudan Univ, Childrens Hosp, Shanghai 200433, Peoples R China.
[2]Wenzhou Med Coll, Yuying Childrens Hosp, Wenzhou, Peoples R China.
[3]Cent China Univ, Tongji Hosp, Wuhan, Peoples R China.
[4]Peoples Hosp Gansu, Lanzhou, Peoples R China.
[5]Ningbo Women & Children Hosp, Ningbo, Zhejiang, Peoples R China.
[6]Guangxi Med Univ, Affiliated Hosp 1, Nanning, Peoples R China.
[7]Cent S Univ, Xiangya Hosp 2, Changsha, Hunan, Peoples R China.
[8]Weifang Matern & Child Care Hosp, Weifang, Peoples R China.
[9]Chengdu Womens & Childrens Cent Hosp, Chengdu, Peoples R China.
[10]Zhejiang Univ, Sch Med, Childrens Hosp, Hangzhou 310003, Zhejiang, Peoples R China.
[11]Chongqing Med Univ, Childrens Hosp, Chongqing, Peoples R China.